2008-04-26 Tracking News

Contents on 26 April '08

IAU Minor Planet Center
- NEOCP Activity -- five listings: 1 new, 4 updated
- New MPECs -- five MPECs
Observers -- 49 observing facilities
Impact Risk Monitoring -- six objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

NOTE: The Tracking News and this Web site will be updating less often, and at sometimes irregular intervals, for the rest of April.

The latest A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity on 26 April '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2339 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of six objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 26 April '08

Minor Planet Electronic Circulars

As of last check at 2339 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-H28 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2008-H29 time-stamped "14:59 UT" - Comet C/2008 G1 (Gibbs) - see below
MPEC 2008-H30 time-stamped "15:08 UT" - Comet C/2008 H1 (LINEAR) - see below
MPEC 2008-H31 time-stamped "15:22 UT" - Observations of Comets - see below
MPEC 2008-H32 time-stamped "15:27 UT" - 2008 HL

MPEC 2008-H32 - "15:27 UT" - 2008 HL

K08H00L 2008 HL (H=20.3 ~295m) was discovered at 1104 UT on 25 April by the Mt. Lemmon Survey (MLS), which observed it at April 25.46-49p12 and 26.48p8. The discovery was confirmed by the Spacewatch 1.8m telescope (April 26.47-48p3).

MPEC 2008-H31 - "15:22 UT" - Observations of Comets

PK08G020 P/2008 G2 from Montcabre Obs. (April 23.88-89p3), La Axarquia Obs. (April 23.97p1), and Remanzacco Obs. (April 24.91-95p3)
CK08C010 C/2008 C1 (Chen-Gao) from Kiev Comet Station (April 14.76-80p9), Szeged Obs. (April 16.81p3), Cesson Obs. (April 19.83-84p3), Moriyama Obs. (April 20.50-51p2), Stammersdorf Obs. (April 20.80-81p3), and Rodeno Obs. (April 25.83-84p3)
CK07W010 C/2007 W1 (Boattini) from Konan Obs. (April 6.60-62p4), Vega del Thader Obs. (April 10.90-91p9), Kiev Comet Station (April 14.87-88p3), Auckland Obs. (April 17.48p3 & 23.33p3), Farm Cove Obs. (April 20.44p3), Moriyama Obs. (April 21.52-53p2), Atlante Obs. (April 21.87-88p3 & 22.87-89p3), Nazaret Obs. (April 21.94-95p4), Chante-Perdrix Obs. (April 22.86-87p3, 23.90p3, 24.87p2 & 25.90-91p3), Calarreona Obs. (April 22.89p3), Montcabre Obs. (April 22.90p3 & 25.94p3), La Vara Obs. (April 24.94p3), Monte Deva Obs. (April 24.95-96p5), Linceo Obs. (April 25.86-87p3), Malaga Obs. (April 25.89-90p4), and Rodeno Obs. (April 25.90-91p3)
PK07T040 P/2007 T4 (Gibbs) from Schiaparelli Obs. (April 4.88p1 & 4.92p1) and MLS (April 25.24-25p2)
CK07M020 C/2007 M2 (Catalina) from Ageo Obs. (March 29.74-75p2), Farm Cove Obs. (April 20.44-45p3), Moriyama Obs. (April 21.54p2), Calarreona Obs. (April 22.90p3), Atlante Obs. (April 23.87-88p3), LINEAR (April 24.20-24p5), the Catalina Sky Survey (CSS) (April 24.22-24p4), and Malaga Obs. (April 25.03-05p3)
CK07G010 C/2007 G1 (LINEAR) from Iluro Obs. (April 19.11-12p3), Rodeno Obs. (April 26.04-05p3), and Masquefa Obs. (April 26.10-11p3)
CK07B020 C/2007 B2 (Skiff) from Ageo Obs. (April 11.72-73p3), Vega del Thader Obs. (April 12.98-99p3), Moriyama Obs. (April 21.58-59p2), Malaga Obs. (April 22.85-87p3), Carmelita Obs. (April 22.88-89p3), Calarreona Obs. (April 22.89-90p3), Atlante Obs. (April 22.93-94p3), LINEAR (April 24.24-28p5), RAS Obs. Mayhill (April 24.32p1 & 25.26p1), Chante-Perdrix Obs. (April 24.88p2), Iluro Obs. (April 24.89p3), La Vara Obs. (April 24.95p3), Remanzacco Obs. (April 25.87p2), Linceo Obs. (April 25.89-90p3), Rodeno Obs. (April 25.91-92p3), and Masquefa Obs. (April 25.96-97p3)
CK06S050 C/2006 S5 (Hill) from Ageo Obs. (April 6.57-58p3), CSS (April 17.15-17p4 & 25.13-15p4), Moriyama Obs. (April 20.53p2 & 21.48-49p2), Malaga Obs. (April 22.95p3), La Vara Obs. (April 24.92-93p2), and LINEAR (April 25.15-18p4)
CK06Q010 C/2006 Q1 (McNaught) from Ageo Obs. (April 6.55p2), Konan Obs. (April 6.58p3), Auckland Obs. (April 17.39p3), Moriyama Obs. (April 20.49p2), Montcabre Obs. (April 22.86p3), Atlante Obs. (April 22.86-87p2), and Malaga Obs. (April 25.88-89p4)
CK06K040 C/2006 K4 (NEAT) from Auckland Obs. (April 17.46p3 & 19.52-53p3)
CK05L030 C/2005 L3 (McNaught) from Schiaparelli Obs. (April 13.12-14p2), La Axarquia Obs. (April 19.02-05p3), Iluro Obs. (April 19.05p3 & 23.02p3), Masquefa Obs. (April 19.05-06p3 & 26.09p3), Vitebsk Obs. (April 21.00p4), Moriyama Obs. (April 22.64-65p2), Atlante Obs. (April 24.08-09p3), Monte Deva Obs. (April 24.99p5), LINEAR (April 25.29-33p5), Borken Obs. (April 25.97p2), and Rodeno Obs. (April 26.03-04p3)
CK02V94Q C/2002 VQ94 (LINEAR) from CSS (April 10.30-33p4), Paus Obs. (April 21.88-90p2), and Ametlla del Valles Obs. (April 24.95-96p5)
0194P 194P/LINEAR from Buchloe Obs. (April 7.90p1) and LINEAR (April 8.13-18p5, 17.14-18p5 & 18.14-18p4)
0180P 180P/NEAT from CSS (April 18.26-28p4), Moriyama Obs. (April 21.57p2), Vitebsk Obs. (April 21.87-88p3), Carmelita Obs. (April 22.85-87p3), and Sant Cugat del Valles Obs. (April 24.92-94p3)
0172P 172P/Yeung from Nira Obs. (April 16.86p1 & 16.96-97p2) and CSS (April 25.20-22p4)
0124P 124P/Mrkos from Konan Obs. (April 6.55-56p3), CSS (April 18.21-23p4 & 24.16-18p4), Moriyama Obs. (April 21.50-51p2), Vitebsk Obs. (April 21.85-86p3), and MLS (April 25.21-23p4)
0065P 65P/Gunn from LINEAR (April 17.14-18p3) and Rodeno Obs. (April 25.88-90p3)
0046P 46P/Wirtanen from Szeged Obs. (April 16.82-83p3), Nazaret Obs. (April 17.87-88p3), Montcabre Obs. (April 18.83p3), Moriyama Obs. (April 20.54p2), Stammersdorf Obs. (April 20.84-85p2), Vitebsk Obs. (April 21.82-83p3), Laietania Obs. (April 22.85p1), Chante-Perdrix Obs. (April 24.82p3), La Vara Obs. (April 24.91-92p3), and Rodeno Obs. (April 25.86-87p3)
0029P 29P/Schwassmann-Wachmann 1 from Ageo Obs. (April 5.53p2), Szeged Obs. (April 16.84p2), Gualba Obs. (April 24.86p1), and Rodeno Obs. (April 25.84-86p3)
0026P 26P/Grigg-Skjellerup from Auckland Obs. (April 8.73p3), Ageo Obs. (April 11.78p3), Vega del Thader Obs. (April 13.12p2), RAS Mayhill (April 19.45-47p2), and LINEAR (April 24.41-45p5)
0017P 17P/Holmes from Ageo Obs. (April 6.47p2) and Nazaret Obs. (April 22.86-87p3)
0008P 8P/Tuttle from Auckland Obs. (April 19.51-52p3) and RAS Obs. Moorook (April 23.46p1)
0007P 7P/Pons-Winnecke from Montcabre Obs. (April 18.85p2) and La Vara Obs. (April 24.97p1)

MPEC 2008-H30 - "15:08 UT" - Comet C/2008 H1 (LINEAR)

CK08H010 C/2008 H1 (LINEAR) (i=75.7°, q=2.786 AU, TP=2008 Mar. 21.357 TT) from Montana Blanca Obs. (April 19.93-94p2), Farra d'Isonzo Obs. (April 19.97-98p3), Siegen Obs. (April 20.93-98p3), Moriyama Obs. (April 21.62p2), Nira Obs. (April 21.89-94p3), Nazaret Obs. (April 21.90-92p3), Vitebsk Obs. (April 21.96-97p3), Ageo Obs. (April 22.73-74p2), Montcabre Obs. (April 22.82-84p3 & 24.92p3), Carmelita Obs. (April 22.89-91p3), Malaga Obs. (April 22.97p1, 23.03p1 & 25.10p1), Atlante Obs. (April 23.96-97p3), Iluro Obs. (April 24.98-01p3), and Masquefa Obs. (April 26.07-08p3)

MPEC 2008-H29 - "14:59 UT" - Comet C/2008 G1 (Gibbs)

CK08G010 C/2008 G1 (Gibbs) (i=73.1°, q=4.000 AU, TP=2009 Jan. 11.012 TT) from Cordell-Lorenz Obs. (April 17.32-35p4 & 18.40p1), Paus Obs. (April 22.96p1), and Montcabre Obs. (April 23.97-01p2 & 24.08p1)

<< DOU on 26 Apr. '08 >> MPEC 2008-H28 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08H00H 2008 HH (almost small, arc=1 day, H=21.9 ~141m) from Spacewatch 1.8m (April 25.30-31p3)
K08G00H 2008 GH (small asteroid, Q=4.510 AU, arc=7 days, H=23.8 ~59m) from Spacewatch 1.8m (April 8.22-25p3)
K08F05F 2008 FF5 (small asteroid, q=0.079 AU, Q=4.481 AU, arc=11 days, H=23.1 ~81m) from Spacewatch 1.8m (April 8.15-17p2)
K08E09A 2008 EA9 (small asteroid, arc=28 days, H=27.7 ~10m) from Spacewatch 1.8m (April 3.24-27p3)
Observations of recently (no longer) risk-listed objects
K08H00G 2008 HG (small asteroid, arc=1 day, H=23.6 ~65m) from Spacewatch 1.8m (April 25.29p3)
K08GB0H 2008 GH110 (arc=10 days, H=19.8 ~371m) from Astronomical Research Obs. (ARO) (April 21.27-30p3 & 22.32-33p3)
K08GB0A 2008 GA110 (almost small, Q=4.477 AU, arc=11 days, H=21.9 ~141m) from ARO (April 22.27-28p3) and Spacewatch 1.8m (April 25.26-27p3)
K08G00F 2008 GF (arc=24 days, H=20.7 ~245m) from Spacewatch 1.8m (April 25.25p3)
K08F06T 2008 FT6 (arc=96 days, H=17.5 ~1.07 km) from MLS (April 25.36-38p4)
K08F05W 2008 FW5 (almost small, arc=28 days, H=21.8 ~148m) from ARO (April 23.34-35p3) and Spacewatch 1.8m (April 25.35p2)
K08F00N 2008 FN (i=44.7°, arc=2 opp, H=18.5 ~676m) from ARO (April 22.34-35p4)
Observations of small asteroids (H>22.0)
K08GB0E 2008 GE110 (arc=10 days, H=22.1 ~129m) from ARO (April 22.19-21p3)
K08GB0C 2008 GC110 (arc=10 days, H=22.4 ~112m) from ARO (April 22.29-30p3)
K08G21X 2008 GX21 (arc=9 days, H=22.7 ~98m) from ARO (April 22.22-23p3)
K08G20U 2008 GU20 (arc=13 days, H=23.1 ~81m) from ARO (April 22.24-25p3)
K08G02G 2008 GG2 (arc=20 days, H=23.0 ~85m) from ARO (April 22.25-27p3) and Spacewatch 1.8m (April 25.38p3)
K08E85E 2008 EE85 (arc=21 days, H=22.7 ~98m) from Peschiera del Garda Obs. (March 31.90-91p3)
K08E84X 2008 EX84 (arc=42 days, H=22.3 ~117m) from ARO (April 23.31-33p3)
K08C22D 2008 CD22 (arc=74 days, H=22.1 ~129m) from ARO (April 23.26-28p3)
J98K03G 1998 KG3 (arc=3 opp, H=22.2 ~123m) from ARO (April 22.26-27p3)
Observations of other objects
K08GB0J 2008 GJ110 (q=0.279 AU, arc=9 days, H=20.5 ~269m) from ARO (April 22.22-23p4)
K08GB0B 2008 GB110 (i=36.3°, arc=8 days, H=19.7 ~389m) from ARO (April 21.18-19p3)
K08G20V 2008 GV20 (arc=13 days, H=18.6 ~645m) from ARO (April 23.23-24p3)
K08G04A 2008 GA4 (arc=17 days, H=19.3 ~467m) from Spacewatch 1.8m (April 25.28p3)
K08G03V 2008 GV3 (i=72.9°, arc=19 days, H=18.6 ~645m) from Iluro Obs. (April 24.96p3) and Peschiera del Garda Obs. (April 25.94-95p3)
K08G01E 2008 GE1 (arc=21 days, H=19.3 ~467m) from Spacewatch 1.8m (April 25.39-40p3)
K08G00X 2008 GX (arc=18 days, H=19.4 ~446m) from ARO (April 21.10p1)
K08E09B 2008 EB9 (arc=48 days, H=20.4 ~282m) from Spacewatch 1.8m (April 25.20-21p3)
K08E06L 2008 EL6 (arc=51 days, H=21.1 ~204m) from Spacewatch 1.8m (April 25.47-49p3)
K08E00R 2008 ER (arc=52 days, H=21.3 ~186m) from ARO (April 23.13-15p3 at V=22.1-2)
K08E00E 2008 EE (arc=53 days, H=19.6 ~407m) from ARO (April 23.07-08p3)
K08D05J 2008 DJ5 (arc=57 days, H=19.9 ~355m) from Spacewatch 1.8m (April 25.23-24p3)
K08CB8R 2008 CR118 (arc=2 opp, H=18.8 ~589m) from ARO (April 7.17-19p3)
K08C72L 2008 CL72 (arc=79 days, H=19.9 ~355m) from ARO (April 22.14-16p3)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.9 ~2.24 km, q=1.271 AU) from Peschiera del Garda Obs. (April 25.90-92p3)
K07M13K 2007 MK13 (arc=2 opp, H=19.9 ~355m) from ARO (April 22.34-35p3)
K06B55G 2006 BG55 (arc=3 opp, H=18.4 ~708m) from Peschiera del Garda Obs. (April 19.84-87p3)
K05X01E 2005 XE1 (arc=2 opp, H=18.9 ~562m) from ARO (April 23.37-39p3)
K04X44N 2004 XN44 (arc=2 opp, H=18.3 ~741m) from David Tholen's team on Mauna Kea (April 21.61p2) and ARO (April 22.39-40p5)
K04N09C 2004 NC9 (Q=4.193 AU, arc=3 opp, H=17.2 ~1.23 km) from MLS (April 25.18-20p4)
K04L00E 2004 LE (i=40.4°, Q=4.860 AU, arc=3 opp, H=16.6 ~1.62 km) from Spacewatch 1.8m (April 25.36-37p3)
K04B86L 2004 BL86 (arc=3 opp, H=18.9 ~562m) from ARO (April 23.37-39p3 at V=22.2)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from CSS (April 25.20-22p3)
K03A01D 2003 AD1 (arc=3 opp, H=18.2 ~776m) from ARO (April 21.31-32p3 & 22.36-37p3)
K02G01F 2002 GF1 (arc=3 opp, H=20.5 ~269m) from ARO (April 22.35-36p3)
K01H07Y 2001 HY7 (arc=4 opp, H=20.5 ~269m) from ARO (April 22.38-39p3)
K00Q07W 2000 QW7 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (April 25.31-34p3)
K00E70R 2000 ER70 (i=36.9°, arc=4 opp, H=16.9 ~1.41 km) from ARO (April 23.34-36p3)
J99F00A 1999 FA (arc=2 opp, H=20.6 ~257m) from ARO (April 22.37-38p3)
I4990 184990 2006 KE89 from ARO (April 21.33-35p3)
I4266 184266 2004 VW14 from Iluro Obs. (April 24.95p3) and Capannoli Obs. (April 25.99p1)
D7170 137170 1999 HF1 from MLS (April 25.43-44p4)
A2873 102873 1999 WK11 from CSS (April 25.41-44p4)
86667 86667 2000 FO10 from Iluro Obs. (April 24.90-91p3)
68063 68063 2000 YJ66 from MLS (April 25.16-17p4)
35107 35107 1991 VH from Iluro Obs. (April 25.03p3)
34613 34613 2000 UR13 from MLS (April 25.16-17p4)
24445 24445 2000 PM8 from CSS (April 25.41-43p4)
11054 11054 1991 FA from MLS (April 25.29-31p4)
05836 5836 1993 MF from Capannoli Obs. (April 25.96p1)
05626 5626 1991 FE from CSS (April 25.38-40p4)
04954 4954 Eric (1990 SQ) from CSS (April 25.18-19p4)
04503 4503 Cleobulus (1989 WM) from MLS (April 25.36-38p4) and CSS (April 25.38-40p4)
03554 3554 Amun (1986 EB) from CSS (April 25.16-17p4)
03288 3288 Seleucus (1982 DV) from CSS (April 25.13-15p4)
01866 1866 Sisyphus (1972 XA) from Iluro Obs. (April 24.94p3)
01864 1864 Daedalus (1971 FA) from MLS (April 25.26-28p4)

Observers on 26 April '08

A total of 49 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 8 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 M2, C/2007 B2, C/2006 S5, C/2006 Q1, 29P, 26P, 17P
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-H31 -- C/2002 VQ94
`H55`	Astronomical Research Obs. (ARO) in Illinois, 30 in MPEC 2008-H28 -- 2008 GX21, 2008 GX, 2008 GV20, 2008 GU20, 2008 GJ110, 2008 GH110, 2008 GG2, 2008 GE110, 2008 GC110, 2008 GB110, 2008 GA110, 2008 FW5, 2008 FN, 2008 EX84, 2008 ER, 2008 EE, 2008 CR118, 2008 CL72, 2008 CD22, 2007 MK13, 2005 XE1, 2004 XN44, 2004 BL86, 2003 AD1, 2002 GF1, 2001 HY7, 2000 ER70, 1999 FA, 1998 KG3, 184990
`J51`	Atlante Obs. in the Canary Islands, 6 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 Q1, C/2005 L3
`467`	Auckland Obs. in New Zealand, 5 in MPEC 2008-H31 -- C/2007 W1, C/2006 Q1, C/2006 K4, 26P, 8P
`B59`	Borken Obs. in Germany, 1 in MPEC 2008-H31 -- C/2005 L3
`215`	Buchloe Obs. in Germany, 1 in MPEC 2008-H31 -- 194P
`J79`	Calarreona Obs. in Spain, 3 in MPEC 2008-H31 -- C/2007 W1, C/2007 M2, C/2007 B2
`B09`	Capannoli Obs. in Italy, 2 in MPEC 2008-H28 -- 184266, 5836
`B20`	Carmelita Obs. in Spain, 3 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 B2, 180P
`703`	Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2008-H28 & 2008-H31 -- C/2007 M2, C/2006 S5, 2003 GW, C/2002 VQ94, 24445, 102873, 5626, 4954, 4503, 3554, 3288, 180P, 172P, 124P
`B24`	Cesson Obs. in France, 1 in MPEC 2008-H31 -- C/2008 C1
`A77`	Chante-Perdrix Obs. in France, 3 in MPEC 2008-H31 -- C/2007 W1, C/2007 B2, 46P
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2008-H29 -- C/2008 G1
`E85`	Farm Cove Obs., 2 in MPEC 2008-H31 -- C/2007 W1, C/2007 M2
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-H30 -- C/2008 H1
`442`	Gualba Obs. in Spain, 1 in MPEC 2008-H31 -- 29P
`B19`	Iluro Obs. in Spain, 9 in MPECs 2008-H28, 2008-H30 & 2008-H31 -- C/2008 H1, 2008 GV3, C/2007 G1, C/2007 B2, C/2005 L3, 86667, 35107, 184266, 1866
`585`	Kiev Comet Station in the Ukraine, 2 in MPEC 2008-H31 -- C/2008 C1, C/2007 W1
`352`	Konan Obs. in Japan, 3 in MPEC 2008-H31 -- C/2007 W1, C/2006 Q1, 124P
`704`	LINEAR in New Mexico, 7 in MPEC 2008-H31 -- C/2007 M2, C/2007 B2, C/2006 S5, C/2005 L3, 194P, 65P, 26P
`J31`	La Axarquia Obs. in Spain, 2 in MPEC 2008-H31 -- P/2008 G2, C/2005 L3
`J38`	La Vara Obs. in Spain, 5 in MPEC 2008-H31 -- C/2007 W1, C/2007 B2, C/2006 S5, 46P, 7P
`B57`	Laietania Obs. in Spain, 1 in MPEC 2008-H31 -- 46P
`J59`	Linceo Obs. in Spain, 2 in MPEC 2008-H31 -- C/2007 W1, C/2007 B2
`J40`	Malaga Obs. in Spain, 6 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 S5, C/2006 Q1
`232`	Masquefa Obs. in Spain, 4 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 G1, C/2007 B2, C/2005 L3
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-H28 -- 2004 XN44
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-H30 -- C/2008 H1
`213`	Montcabre Obs. in Spain, 7 in MPECs 2008-H29, 2008-H30 & 2008-H31 -- C/2008 H1, P/2008 G2, C/2008 G1, C/2007 W1, C/2006 Q1, 46P, 7P
`945`	Monte Deva Obs. in Spain, 2 in MPEC 2008-H31 -- C/2007 W1, C/2005 L3
`900`	Moriyama Obs. in Japan, 11 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2008 C1, C/2007 W1, C/2007 M2, C/2007 B2, C/2006 S5, C/2006 Q1, C/2005 L3, 180P, 124P, 46P
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-H28, 2008-H31 & 2008-H32 -- 2008 HL, 2008 FT6, P/2007 T4, 2004 NC9, 68063, 34613, 137170, 11054, 4503, 1864, 124P
`J47`	Nazaret Obs. in Spain, 4 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2007 W1, 46P, 17P
`J29`	Nira Obs. in Spain, 2 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, 172P
`B49`	Paus Obs. in Spain, 2 in MPECs 2008-H29 & 2008-H31 -- C/2008 G1, C/2002 VQ94
`A53`	Peschiera del Garda Obs. in Italy, 4 in MPEC 2008-H28 -- 2008 GV3, 2008 EE85, 2007 VQ4, 2006 BG55
`H06`	RAS Obs. Mayhill in New Mexico, 2 in MPEC 2008-H31 -- C/2007 B2, 26P
`D90`	RAS Obs. Moorook in South Australia, 1 in MPEC 2008-H31 -- 8P
`473`	Remanzacco Obs. in Italy, 2 in MPEC 2008-H31 -- P/2008 G2, C/2007 B2
`939`	Rodeno Obs. in Spain, 8 in MPEC 2008-H31 -- C/2008 C1, C/2007 W1, C/2007 G1, C/2007 B2, C/2005 L3, 65P, 46P, 29P
`B61`	Sant Cugat del Valles Obs. in Spain, 1 in MPEC 2008-H31 -- 180P
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2008-H31 -- P/2007 T4, C/2005 L3
`510`	Siegen Obs. in Germany, 1 in MPEC 2008-H30 -- C/2008 H1
`291`	Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2008-H28 & 2008-H32 -- 2008 HL, 2008 HH, 2008 HG, 2008 GH, 2008 GG2, 2008 GF, 2008 GE1, 2008 GA4, 2008 GA110, 2008 FW5, 2008 FF5, 2008 EL6, 2008 EB9, 2008 EA9, 2008 DJ5, 2004 LE, 2000 QW7
`A97`	Stammersdorf Obs. in Austria, 2 in MPEC 2008-H31 -- C/2008 C1, 46P
`629`	Szeged Obs. in Hungary, 3 in MPEC 2008-H31 -- C/2008 C1, 46P, 29P
`J70`	Vega del Thader Obs. in Spain, 3 in MPEC 2008-H31 -- C/2007 W1, C/2007 B2, 26P
`B42`	Vitebsk Obs. in Belarus, 5 in MPECs 2008-H30 & 2008-H31 -- C/2008 H1, C/2005 L3, 180P, 124P, 46P

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 26 April '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2339 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2008 HJ	NEODyS	1224	2071-2090	10	7.51e-06	-5.65	-5.86	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2008/04/24.248 to 2008/04/25.816."

2008 HH	JPL Sentry	1224	2016-2106	78	1.3e-07	-5.11	-5.72	0	JPL: "Analysis based on 17 observations spanning .99843 days (2008-Apr-24.30829 to 2008-Apr-25.30672)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2008 HH	NEODyS	1224	2011-2090	56	4.19e-07	-4.29	-4.58	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/04/24.309 to 2008/04/25.307."

2008 GH	NEODyS	1224	R E M O V E D						-

2008 FF5	JPL Sentry	1224	2060	1	3.6e-07	-4.91	-4.91	0	JPL: "Analysis based on 52 observations spanning 10.849 days (2008-Mar-28.32219 to 2008-Apr-08.17156)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
2008 FF5	NEODyS	1224	2060	1	3.51e-07	-4.92	-4.92	0	NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2008/03/28.323 to 2008/04/08.172."

2008 EA9	JPL Sentry	1224	2068-2103	8	2.5e-05	-6.32	-6.86	0	JPL: "Analysis based on 58 observations spanning 27.860 days (2008-Mar-06.40551 to 2008-Apr-03.26595)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2008 EA9	NEODyS	1224	2061-2089	20	3.79e-05	-6.11	-6.60	0	NEODyS: "Based on 59 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/04/03.267."

2004 FU162	JPL Sentry	0024	2009-2104	820	6.2e-05	-5.43	-6.37	0	JPL: "Analysis based on 4 observations spanning .03055 days (2004-Mar-31.27744 to 2004-Mar-31.30799)." Diameter approximately 0.006 km. from mean, weighted H=28.9.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 26 April '08

Times are UTC for when items were noted or added by The Tracking News.

1615	Grabbed MPEC 2008-H29 - Comet C/2008 G1 (Gibbs) - see above Grabbed MPEC 2008-H30 - Comet C/2008 H1 (LINEAR) - see above Grabbed MPEC 2008-H31 - Observations of Comets - see above Grabbed MPEC 2008-H32 - 2008 HL - see above
1224	Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above Noted that NEODyS has updated its 2008 EA9 risk assessment - see above Noted that JPL Sentry has updated its 2008 FF5 risk assessment - see above Noted that NEODyS has updated its 2008 FF5 risk assessment - see above Noted that NEODyS has removed 2008 GH as an impact risk - see above Noted that JPL Sentry has updated its 2008 HH risk assessment - see above Noted that NEODyS has updated its 2008 HH risk assessment - see above Noted that NEODyS has posted 2008 HJ as an impact risk - see above Grabbed MPEC 2008-H28 - Daily Orbit Update - see above
0024	Noted that JPL Sentry has updated its 2004 FU162 risk assessment - see above

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