2008-04-30 Tracking News

Contents on 30 April '08

IAU Minor Planet Center
- NEOCP Activity -- ten listings: 3 new, 7 updated
- New MPECs -- four MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- three 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, until around May 4th.

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 30 April '08

The MPC's NEO Confirmation Page has 10 listings: 3 new, 7 updated

When last checked at 2345 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and seven updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of sixteen 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 30 April '08

Minor Planet Electronic Circulars

As of last check at 2345 UTC, there have been four MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-H52 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2008-H53 time-stamped "14:13 UT" - 2008 HQ3 - see below
MPEC 2008-H54 time-stamped "14:16 UT" - 2008 HR3 - see below
MPEC 2008-H55 time-stamped "14:20 UT" - 2008 HS3

MPEC 2008-H55 - "14:20 UT" - 2008 HS3

K08H03S 2008 HS3 (Earth MOID=5.7 LD, H=21.4 ~178m) was discovered at 0414 UT on 30 April by the Catalina Sky Survey (CSS), which observed it at April 30.18-23p8. The discovery was confirmed by Farpoint Obs. (April 30.24-25p4).

MPEC 2008-H54 - "14:16 UT" - 2008 HR3

K08H03R 2008 HR3 (risk-listed, Q=4.187 AU, Earth MOID=0.8 LD, H=24.8 ~37m) was discovered at 0638 UT on 29 April by the Mt. Lemmon Survey (MLS), which observed it at April 29.28-33p8 and 30.26-28p4. This object will be coming within ten lunar distances (LD) of Earth, reaching 3.4 LD on 11 May.

MPEC 2008-H53 - "14:13 UT" - 2008 HQ3

K08H03Q 2008 HQ3 (small asteroid, Earth MOID=2.7 LD, H=27.6 ~10m) was discovered at 0600 UT on 29 April by MLS, which observed it at April 29.25-30p8, 29.39p4, and 30.28p4. This object was within ten lunar distances (LD) of Earth, reaching 8.6 LD on 24 April.

<< DOU on 30 Apr. '08 >> MPEC 2008-H52 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08H03D 2008 HD3 (i=53.5°, arc=2 days, H=19.8 ~371m) from Naef Obs. (April 29.94-98p6)
Observations of recently (no longer) risk-listed objects
K08H00G 2008 HG (small asteroid, arc=5 days, H=23.7 ~62m) from Petit Jean Mtn. South Obs. (PJMSO) (April 29.25-26p8) and MLS (April 29.37-38p4)
K08GB0H 2008 GH110 (arc=15 days, H=19.8 ~371m) from MLS (April 29.49p4)
K08G01D 2008 GD1 (small asteroid, arc=26 days, H=22.4 ~112m) from the Spacewatch 1.8m telescope (April 29.29p2)
K08G00F 2008 GF (arc=28 days, H=20.7 ~245m) from Spacewatch 1.8m (April 29.27-28p3)
K08F00N 2008 FN (i=44.7°, arc=2 opp, H=18.5 ~676m) from Naef Obs. (April 29.88-92p3)
Observations of small asteroids (H>22.0)
K08H03J 2008 HJ3 (arc=1 day, H=23.1 ~81m) from Bergen-Enkheim Obs. (April 29.87-89p3) and Great Shefford Obs. (April 29.94-97p2)
K08H00K 2008 HK (arc=5 days, H=22.2 ~123m) from Greiner Research Obs. (GRO) (April 30.13-14p4)
K08G20W 2008 GW20 (arc=17 days, H=22.1 ~129m) from the Spacewatch 0.9m telescope (April 28.37-41p3)
K08D22W 2008 DW22 (arc=61 days, H=25.6 ~26m) from Spacewatch 1.8m (April 29.34-35p3)
J98K03G 1998 KG3 (arc=3 opp, H=22.2 ~123m) from Capannoli Obs. (April 29.98p1)
Observations of other objects
K08H02F 2008 HF2 (arc=2 days, H=19.7 ~389m) from Spacewatch 1.8m (April 29.42-43p3)
K08G04A 2008 GA4 (arc=21 days, H=19.4 ~446m) from Spacewatch 1.8m (April 29.31-32p3)
K08G03V 2008 GV3 (i=72.9°, arc=23 days, H=18.5 ~676m) from Capannoli Obs. (April 29.94-95p2)
K08F06N 2008 FN6 (arc=31 days, H=21.4 ~178m) from Altschwendt Obs. (April 29.93-95p3) and GRO (April 30.17-18p10)
K08E69D 2008 ED69 (i=36.3°, Q=5.047 AU, arc=49 days, H=16.9 ~1.41 km) from PJMSO (April 29.33-34p7)
K08E69C 2008 EC69 (Q=4.457 AU, arc=71 days, H=17.1 ~1.29 km) from PJMSO (April 29.34-35p6)
K08D00E 2008 DE (arc=77 days, H=19.5 ~426m) from PJMSO (April 29.31-32p6)
K08C23P 2008 CP23 (arc=88 days, H=19.6 ~407m) from PJMSO (April 29.21-22p5)
K07VI3R 2007 VR183 (Q=4.353 AU, arc=222 days, H=17.5 ~1.07 km) from El Leoncito Obs. (April 23.02-04p4)
K07V07Y 2007 VY7 (arc=3 opp, H=19.5 ~426m) from Spacewatch 0.9m (April 29.20-24p3)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.9 ~2.24 km, q=1.271 AU) from PJMSO (April 29.23-24p5) and GRO (April 30.09p5)
K07M00R 2007 MR (arc=2 opp, H=21.7 ~155m) from Spacewatch 0.9m (April 26.45p1)
K06K86V 2006 KV86 (i=37.1°, arc=2 opp, H=18.7 ~616m) from Spacewatch 1.8m (April 29.33p3)
K05S25M 2005 SM25 (arc=2 opp, H=19.5 ~426m) from MLS (April 29.36-38p4 at V=21.0-22.3)
K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from PJMSO (April 29.24-25p6), Hamamatsu-Yuto Obs. (April 29.68-71p7), and Wildberg Obs. (April 29.99-00p6)
K05G59E 2005 GE59 (arc=3 opp, H=18.0 ~851m) from MLS (April 29.25-27p4)
K04F32N 2004 FN32 (arc=4 opp, H=19.1 ~513m) from CSS (April 27.30-33p4), Capannoli Obs. (April 29.92-93p2), and GRO (April 30.15-16p4)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from CSS (April 26.16-17p3 & 29.22-24p3), PJMSO (April 29.20-21p5), and GRO (April 30.08p6)
K03A01D 2003 AD1 (arc=3 opp, H=18.2 ~776m) from Wildberg Obs. (April 30.02-03p5)
K02J00C 2002 JC (i=40.9°, arc=6 opp, H=17.2 ~1.23 km) from PJMSO (April 29.29p5)
K02A29F 2002 AF29 (Q=5.239 AU, arc=2 opp, H=19.2 ~490m) from Spacewatch 1.8m (April 29.41-42p3)
K01XQ6W 2001 XW266 (arc=3 opp, H=19.3 ~467m) from MLS (April 29.42-44p4)
K01SG9K 2001 SK169 (Q=4.713 AU, arc=3 opp, H=17.1 ~1.29 km) from Astronomical Research Obs. (ARO) (April 27.26-29p3 at V=22.1-3)
K01QE2O 2001 QO142 (arc=3 opp, H=19.4 ~446m) from GRO (April 30.12-15p10)
K01H07Y 2001 HY7 (arc=4 opp, H=20.6 ~257m) from Kingsgrove Obs. (April 26.46-47p3), LINEAR (April 29.30-34p5), and MLS (April 29.34-36p3)
K00J05J 2000 JJ5 (arc=3 opp, H=18.9 ~562m) from MLS (April 29.40-44p7)
K00E70R 2000 ER70 (i=36.9°, arc=4 opp, H=16.9 ~1.41 km) from Wildberg Obs. (April 29.96-97p3)
J98S35F 1998 SF35 (arc=5 opp, H=17.8 ~933m) from Kingsgrove Obs. (April 26.43-44p3)
I4990 184990 2006 KE89 from LINEAR (April 29.31-34p4)
I4266 184266 2004 VW14 from Naef Obs. (April 29.95-96p2)
F3591 153591 2001 SN263 from El Leoncito Obs. (April 23.11-13p3 & 24.04-06p3)
D7170 137170 1999 HF1 from Ondrejov Obs. (April 26.86-92p4, 27.00-02p2, 27.06-08p2, 27.85-04p9 & 28.08p1) and PJMSO (April 29.30-31p5)
86667 86667 2000 FO10 from LINEAR (April 29.25-29p5)
68348 68348 2001 LO7 from CSS (April 27.44-45p4)
68278 68278 2001 FC7 from Kingsgrove Obs. (April 29.47p3)
53789 53789 2000 ED104 from CSS (April 29.31-33p4)
53409 53409 1999 LU7 from MLS (April 29.34-36p4)
53319 53319 1999 JM8 from PJMSO (April 29.35-36p5)
35107 35107 1991 VH from CSS (April 27.36-38p8), PJMSO (April 29.30p5), and Hamamatsu-Yuto Obs. (April 29.76-77p3)
22099 22099 2000 EX106 from CSS (April 26.15-17p4)
21088 21088 1992 BL2 from El Leoncito Obs. (April 22.97-99p3 & 23.96-97p3)
11398 11398 1998 YP11 from PJMSO (April 29.32-33p5)
09400 9400 1994 TW1 from CSS (April 27.23-25p4)
06456 6456 Golombek (1992 OM) from CSS (April 27.23-25p4)
05836 5836 1993 MF from El Leoncito Obs. (April 24.11-12p3) and CSS (April 26.29-31p4)
05626 5626 1991 FE from LINEAR (April 29.34-39p5)
04503 4503 Cleobulus (1989 WM) from El Leoncito Obs. (April 23.19-21p3)
03691 3691 Bede (1982 FT) from El Leoncito Obs. (April 23.09-11p3 & 24.02-04p3)
01980 1980 Tezcatlipoca (1950 LA) from El Leoncito Obs. (April 23.21-23p3)
01866 1866 Sisyphus (1972 XA) from CSS (April 27.39-41p4) and Capannoli Obs. (April 29.90-91p3)

Observers on 30 April '08

Nineteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`A44`	Altschwendt Obs. in Austria, 1 in MPEC 2008-H52 -- 2008 FN6
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2008-H52 -- 2001 SK169
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-H52 -- 2008 HJ3
`B09`	Capannoli Obs. in Italy, 4 in MPEC 2008-H52 -- 2008 GV3, 2004 FN32, 1998 KG3, 1866
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-H52 & 2008-H55 -- 2008 HS3, 2004 FN32, 2003 GW, 68348, 53789, 35107, 22099, 9400, 6456, 5836, 1866
`808`	El Leoncito Obs. in Argentina, 7 in MPEC 2008-H52 -- 2007 VR183, 21088, 153591, 5836, 4503, 3691, 1980
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2008-H55 -- 2008 HS3
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-H52 -- 2008 HJ3
`H51`	Greiner Research Obs. (GRO) in Wisconsin, 6 in MPEC 2008-H52 -- 2008 HK, 2008 FN6, 2007 VQ4, 2004 FN32, 2003 GW, 2001 QO142
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-H52 -- 2005 NB7, 35107
`E19`	Kingsgrove Obs. in New South Wales, 3 in MPEC 2008-H52 -- 2001 HY7, 1998 SF35, 68278
`704`	LINEAR in New Mexico, 4 in MPEC 2008-H52 -- 2001 HY7, 86667, 184990, 5626
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-H52, 2008-H53 & 2008-H54 -- 2008 HR3, 2008 HQ3, 2008 HG, 2008 GH110, 2005 SM25, 2005 GE59, 2001 XW266, 2001 HY7, 2000 JJ5, 53409
`A13`	Naef Obs. in Switzerland, 3 in MPEC 2008-H52 -- 2008 HD3, 2008 FN, 184266
`557`	Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-H52 -- 137170
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2008-H52 -- 2008 HG, 2008 ED69, 2008 EC69, 2008 DE, 2008 CP23, 2007 VQ4, 2005 NB7, 2003 GW, 2002 JC, 53319, 35107, 137170, 11398
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-H52 -- 2008 GW20, 2007 VY7, 2007 MR
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2008-H52 -- 2008 HF2, 2008 GF, 2008 GD1, 2008 GA4, 2008 DW22, 2006 KV86, 2002 AF29
`198`	Wildberg Obs. in Germany, 3 in MPEC 2008-H52 -- 2005 NB7, 2003 AD1, 2000 ER70

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

Impact Risk Monitoring on 30 April '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2345 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 HR3	JPL Sentry	2345	2022-2106	19	2.1e-07	-6.36	-6.81	0	JPL: "Analysis based on 12 observations spanning 1.0021 days (2008-Apr-29.27703 to 2008-Apr-30.2791)." Diameter approximately 0.037 km. from mean, weighted H=24.8.

2008 HE3	NEODyS	2346	2013-2028	4	6.79e-11	-5.61	-5.72	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/04/28.264 to 2008/04/29.262."

2008 HD3	NEODyS	1045	2017-2090	32	1.66e-08	-4.41	-4.84	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/04/28.265 to 2008/04/29.981."
2008 HD3	JPL Sentry	1044	2020-2104	27	1.5e-08	-4.52	-4.94	0	JPL: "Analysis based on 20 observations spanning 1.7154 days (2008-Apr-28.26455 to 2008-Apr-29.97995)." Diameter approximately 0.420 km. from mean, weighted H=19.5.

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 30 April '08

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

2345	Noted that NEODyS has posted 2008 HE3 as an impact risk - see above Noted that JPL Sentry has posted 2008 HR3 as an impact risk - see above Grabbed MPEC 2008-H53 - 2008 HQ3 - see above Grabbed MPEC 2008-H54 - 2008 HR3 - see above Grabbed MPEC 2008-H55 - 2008 HS3 - see above
1045	Noted that NEODyS has updated its 2008 HD3 risk assessment - see above
1044	Noted that JPL Sentry has posted 2008 HD3 as an impact risk - see above Grabbed MPEC 2008-H52 - Daily Orbit Update - see above

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