2008-04-29 Tracking News

Contents on 29 April '08

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 7 updated
- New MPECs -- four MPECs
Observers -- 26 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 29 April '08

The MPC's NEO Confirmation Page has 7 listings: 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven updated listings. All of these were "one nighters." So far The Tracking News has counted a total of ten 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 29 April '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been four MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-H48 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2008-H49 time-stamped "11:29 UT" - 2008 HE3 - see below
MPEC 2008-H50 time-stamped "15:45 UT" - 2008 CS190 - see below
MPEC 2008-H51 time-stamped "21:36 UT" - 2008 HJ3

MPEC 2008-H51 - "21:36 UT" - 2008 HJ3

K08H03J 2008 HJ3 (small asteroid, H=23.0 ~85m) was discovered at 0428 UT on 29 April by the Mt. Lemmon Survey (MLS), which observed it at April 29.19-21p8. The discovery was confirmed by Sabino Canyon Obs. (April 29.26-27p6), Farpoint Obs. (April 29.27-28p4), and Wildberg Obs. (April 29.83-84p6).

MPEC 2008-H50 - "15:45 UT" - 2008 CS190

K08CJ0S 2008 CS190 (KBO, q=32.859 AU, Q=39.927 AU, H=6.4 ~178 km) was discovered at 1037 UT on 11 Feb. by Mt. Palomar, which observed it at Feb. 11.44-48p2, 12.34p1, 12.38p1, March 25.13p1, 25.19p1, and 26.13p1. The discovery was confirmed by Lowell Obs. Anderson Mesa Station (Feb. 27.18p1, 27.27p1 & 28.18p1).

MPEC 2008-H49 - "11:29 UT" - 2008 HE3

K08H03E 2008 HE3 (risk-listed, i=47.9°, H=18.5 ~676m) was discovered at 0618 UT on 28 April by MLS, which observed it at April 28.26-33p8 at V=21.2-22.1. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (April 28.35-38p3 & 29.22-26p4), the Spacewatch 1.8m telescope (April 29.20-21p3), and Farpoint Obs. (April 29.22-24p2).

<< DOU on 29 Apr. '08 >> MPEC 2008-H48 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08H00J 2008 HJ (small asteroid, arc=4 days, H=25.7 ~25m) from Balzaretto Obs. (April 27.95-97p6), Petit Jean Mtn. South Obs. (PJMSO) (April 28.34-35p9), and Faulkes Telescope South (April 28.59p6)
Observations of recently (no longer) risk-listed objects
K08H00G 2008 HG (small asteroid, arc=4 days, H=23.7 ~62m) from Astronomical Research Obs. (ARO) (April 27.18-19p3) and PJMSO (April 28.35-36p7)
K08H00E 2008 HE (q=0.113 AU, Q=4.554 AU, arc=10 days, H=18.0 ~851m) from Desert Moon Obs. (April 28.19-21p3)
K08F06W 2008 FW6 (arc=29 days, H=21.0 ~214m) from Spacewatch 1.8m (April 28.32-33p3)
Observations of small asteroids (H>22.0)
K08H02D 2008 HD2 (arc=2 days, H=25.1 ~32m) from Great Shefford Obs. (April 28.95-96p2)
K08H00K 2008 HK (arc=4 days, H=22.2 ~123m) from LINEAR (April 28.25-29p5) and ARO (April 29.07-08p3)
K08GB0C 2008 GC110 (arc=14 days, H=22.3 ~117m) from Spacewatch 1.8m (April 28.31-32p3)
K08G21X 2008 GX21 (arc=15 days, H=22.8 ~93m) from Desert Moon Obs. (April 28.23-26p3)
K08G20W 2008 GW20 (arc=17 days, H=22.1 ~129m) from Desert Moon Obs. (April 28.29-30p3)
K08F00O 2008 FO (arc=33 days, H=23.2 ~78m) from Spacewatch 1.8m (April 28.19-20p3 & 29.19-20p3)
K08F00C 2008 FC (arc=35 days, H=24.8 ~37m) from ARO (April 27.22-24p3 at V=22.1-2)
J98K03G 1998 KG3 (arc=3 opp, H=22.2 ~123m) from MLS (April 28.33-35p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K07V03K 2007 VK3 (arc=177 days, H=21.9 ~141m) from ARO (April 24.15-16p3 & 27.17-18p4)
Observations of other objects
K08H01W 2008 HW1 (q=0.102 AU, Q=5.065 AU, arc=29 days, H=17.4 ~1.12 km) from Bisei Spaceguard Center (April 28.67-68p5) and Moriyama Obs. (April 28.68p1)
K08GB0J 2008 GJ110 (q=0.278 AU, arc=14 days, H=20.5 ~269m) from Spacewatch 1.8m (April 29.18-19p3)
K08G04A 2008 GA4 (arc=20 days, H=19.4 ~446m) from Spacewatch 1.8m (April 28.30-31p3)
K08G03V 2008 GV3 (i=72.9°, arc=21 days, H=18.5 ~676m) from Stia Obs. (April 26.80-82p4) and PJMSO (April 28.32-33p6)
K08G03Q 2008 GQ3 (arc=21 days, H=18.9 ~562m) from Desert Moon Obs. (April 28.12-16p3)
K08F06N 2008 FN6 (arc=28 days, H=21.3 ~186m) from Stia Obs. (April 26.83-84p4)
K08E69D 2008 ED69 (i=36.3°, Q=5.046 AU, arc=47 days, H=16.8 ~1.48 km) from ARO (April 27.31-33p3)
K08E05V 2008 EV5 (arc=56 days, H=20.0 ~339m) from Spacewatch 1.8m (April 29.15p2)
K08A00E 2008 AE (arc=2 opp, H=19.8 ~371m) from PJMSO (April 28.29-30p6)
K07Y01X 2007 YX1 (Q=4.542 AU, arc=2 opp, H=17.4 ~1.12 km) from LINEAR (April 27.15-19p4)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.9 ~2.24 km, q=1.271 AU) from the Catalina Sky Survey (CSS) (April 28.26-28p3) and PJMSO (April 28.31-32p5)
K06U00A 2006 UA (arc=2 opp, H=20.1 ~323m) from LINEAR (April 28.20-24p5)
K06K86V 2006 KV86 (i=37.1°, arc=2 opp, H=18.7 ~616m) from Spacewatch 1.8m (April 28.26-27p3)
K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from PJMSO (April 28.37p5)
K05A14H 2005 AH14 (arc=3 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (April 28.16-17p3)
K04RY0H 2004 RH340 (arc=3 opp, H=19.4 ~446m) from David Tholen's team on Mauna Kea (April 21.49p3)
K04F32N 2004 FN32 (arc=4 opp, H=19.0 ~537m) from PJMSO (April 28.31p5)
K01QE2O 2001 QO142 (arc=3 opp, H=19.2 ~490m) from BDI Obs. (April 26.47-48p2 & 28.54-57p3)
K01D47F 2001 DF47 (arc=4 opp, H=20.3 ~295m) from ARO (April 27.27-30p3 at V=22.2-3)
I4266 184266 2004 VW14 from PJMSO (April 28.33-34p5) and CSS (April 28.39-42p4)
I3548 183548 2003 HU42 from MLS (April 28.29-31p4)
F2679 152679 1998 KU2 from the Spacewatch 0.9m telescope (April 28.14-18p3) and LINEAR (April 28.30-35p5)
E4901 144901 2004 WG1 from LINEAR (April 27.15-19p4)
E3678 143678 2003 SA224 from LINEAR (April 28.16-19p4)
D8013 138013 2000 CN101 from LINEAR (April 27.14-19p4)
53435 53435 1999 VM40 from MLS (April 28.29-31p4)
18736 18736 1998 NU from LINEAR (April 28.14-18p5)
13553 13553 1992 JE from LINEAR (April 28.25-29p5)
05836 5836 1993 MF from LINEAR (April 27.30-34p5 & 28.19-23p5)
05604 5604 1992 FE from LINEAR (April 27.15-19p4)
05131 5131 1990 BG from Malaga Obs. (April 27.83-84p3)
04954 4954 Eric (1990 SQ) from Mt. Tuffley Obs. (April 29.05p3)
04503 4503 Cleobulus (1989 WM) from LINEAR (April 28.35-40p5)
03757 3757 1982 XB from MLS (April 28.22-23p4)
03691 3691 Bede (1982 FT) from Boambee Obs. (April 27.38p1)
03288 3288 Seleucus (1982 DV) from Malaga Obs. (April 27.91-93p4)
01866 1866 Sisyphus (1972 XA) from Crni Vrh Obs. (April 28.00-05p4)
01864 1864 Daedalus (1971 FA) from LINEAR (April 28.25-29p5)

Observers on 29 April '08

A total of 26 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2008-H48 -- 2008 HK, 2008 HG, 2008 FC, 2008 ED69, 2007 VK3, 2001 DF47
`E18`	BDI Obs. in New South Wales, 1 in MPEC 2008-H48 -- 2001 QO142
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2008-H48 -- 2008 HJ
`300`	Bisei Spaceguard Center in Japan, 1 in MPEC 2008-H48 -- 2008 HW1
`432`	Boambee Obs. in New South Wales, 1 in MPEC 2008-H48 -- 3691
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2008-H48 -- 2007 VQ4, 184266
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-H48 -- 1866
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-H48 -- 2008 HE, 2008 GX21, 2008 GW20, 2008 GQ3
`734`	Farpoint Obs. in Kansas, 2 in MPECs 2008-H49 & 2008-H51 -- 2008 HJ3, 2008 HE3
`E10`	Faulkes Telescope South in New South Wales, 1 in MPEC 2008-H48 -- 2008 HJ
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-H48 -- 2008 HD2
`704`	LINEAR in New Mexico, 13 in MPEC 2008-H48 -- 2008 HK, 2007 YX1, 2006 UA, 18736, 152679, 144901, 143678, 138013, 13553, 5836, 5604, 4503, 1864
`688`	Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2008-H50 -- 2008 CS190
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-H49 -- 2008 HE3
`J40`	Malaga Obs. in Spain, 2 in MPEC 2008-H48 -- 5131, 3288
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-H48 -- 2004 RH340
`900`	Moriyama Obs. in Japan, 1 in MPEC 2008-H48 -- 2008 HW1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-H48, 2008-H49 & 2008-H51 -- 2008 HJ3, 2008 HE3, 1998 KG3, 53435, 183548, 3757
`675`	Mt. Palomar in southern California, 1 in MPEC 2008-H50 -- 2008 CS190
`J93`	Mt. Tuffley Obs. in England, 1 in MPEC 2008-H48 -- 4954
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2008-H48 -- 2008 HJ, 2008 HG, 2008 GV3, 2008 AE, 2007 VQ4, 2005 NB7, 2004 FN32, 184266
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-H51 -- 2008 HJ3
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-H48 -- 152679
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-H48 & 2008-H49 -- 2008 HE3, 2008 GJ110, 2008 GC110, 2008 GA4, 2008 FW6, 2008 FO, 2008 EV5, 2006 KV86, 2005 AH14
`A78`	Stia Obs. in Italy, 2 in MPEC 2008-H48 -- 2008 GV3, 2008 FN6
`198`	Wildberg Obs. in Germany, 1 in MPEC 2008-H51 -- 2008 HJ3

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

Impact Risk Monitoring on 29 April '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 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 HE3	JPL Sentry	1727	2014-2025	2	3.1e-10	-4.75	-4.91	0	JPL: "Analysis based on 20 observations spanning .99800 days (2008-Apr-28.263 to 2008-Apr-29.261)." Diameter approximately 0.900 km. from mean, weighted H=17.9.

2008 HD3	NEODyS	1233	2014-2084	16	7.94e-10	-5.56	-5.99	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/04/28.265 to 2008/04/28.471."

2008 HJ	NEODyS	1954	2077-2081	2	3.76e-05	-5.01	-5.06	0	NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2008/04/24.248 to 2008/04/28.590."
2008 HJ	JPL Sentry	1727	2077-2106	20	1.6e-04	-4.47	-4.96	0	JPL: "Analysis based on 66 observations spanning 4.3423 days (2008-Apr-24.24725 to 2008-Apr-28.58953)." Diameter approximately 0.026 km. from mean, weighted H=25.6.

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 29 April '08

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

2354	Grabbed MPEC 2008-H51 - 2008 HJ3 - see above
1954	Noted that NEODyS has updated its 2008 HJ risk assessment - see above
1728	Grabbed MPEC 2008-H50 - 2008 CS190 - see above
1727	Noted that JPL Sentry has posted 2008 HE3 as an impact risk - see above Noted that JPL Sentry has updated its 2008 HJ risk assessment - see above
1233	Noted that NEODyS has posted 2008 HD3 as an impact risk - see above Grabbed MPEC 2008-H48 - Daily Orbit Update - see above Grabbed MPEC 2008-H49 - 2008 HE3 - see above

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