Contents on 28 March '08
- IAU Minor Planet Center
- Observers -- fourteen observing facilities
- Impact Risk Monitoring -- two objects
- 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
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 28 March '08
The MPC's NEO Confirmation Page has 6 listings: 6 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six updated listings. Of these, five 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 28 March '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been nine MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-F40 time-stamped "06:07 UT" - Daily Orbit Update - see below
- MPEC 2008-F41 time-stamped "15:10 UT" - 2008 FG - see below
- MPEC 2008-F42 time-stamped "15:27 UT" - 2008 FH - see below
- MPEC 2008-F43 time-stamped "15:33 UT" - 2008 FJ - see below
- MPEC 2008-F44 time-stamped "15:38 UT" - 2008 FK - see below
- MPEC 2008-F45 time-stamped "15:41 UT" - 2008 FM - see below
- MPEC 2008-F46 time-stamped "15:46 UT" - 2008 FN - see below
- MPEC 2008-F47 time-stamped "16:20 UT" - 2008 FO - see below
- MPEC 2008-F48 time-stamped "16:52 UT" - 2008 FP
MPEC 2008-F48 - "16:52 UT" - 2008 FP
- K08F00P 2008 FP (small asteroid, q=0.317 AU, Earth MOID=0.5 LD, H=26.5 ~17m) was discovered at 0832 UT on 28 March by the Mt. Lemmon Survey (MLS), which observed it at March 28.36-40p8. The discovery was confirmed by Sabino Canyon Obs. (March 28.39p3) and Tiki Obs. (March 28.49-51p2). This object will be coming within ten lunar distances (LD) of Earth, reaching 0.5 LD on 29 March (INTRUDER).
MPEC 2008-F47 - "16:20 UT" - 2008 FO
- K08F00O 2008 FO (small asteroid, Earth MOID=1.5 LD, H=23.2 ~78m) was discovered at 0709 UT on 27 March by LINEAR, which observed it at March 27.30-35p5. The discovery was confirmed by MLS (March 28.11p4), Grasslands Obs. (March 28.16p3), Jim Young via Table Mtn. Obs. (March 28.18-21p4), Greiner Research Obs. (GRO) (March 28.20-21p9), Heath Rhoades via Table Mtn. Obs. (March 28.27p1), and Tiki Obs. (March 28.37-41p3).
MPEC 2008-F46 - "15:46 UT" - 2008 FN
- K08F00N 2008 FN (i=46.6°, Q=4.204 AU, Earth MOID=5.8 LD, H=18.1 ~812m) was discovered at 1101 UT on 27 March by MLS, which observed it at March 27.46-50p8 and 28.46-47p3. The discovery was confirmed by the Spacewatch 1.8m telescope (March 28.45-46p3).
MPEC 2008-F45 - "15:41 UT" - 2008 FM
- K08F00M 2008 FM (small asteroid, H=24.7 ~39m) was discovered at 0624 UT on 27 March by MLS, which observed it at March 27.27-33p8 and 28.22-24p4. The discovery was confirmed by Spacewatch 1.8m (March 28.26-27p2).
MPEC 2008-F44 - "15:38 UT" - 2008 FK
- K08F00K 2008 FK (risk-listed, Earth MOID=0.2 LD, H=27.3 ~12m) was discovered at 0603 UT on 27 March by the Spacewatch 0.9m telescope, which observed it at March 27.25-28p3. The discovery was confirmed by Spacewatch 1.8m (March 27.34-35p3, 27.43p3 & 28.28p2). This object was within ten lunar distances (LD) of Earth, reaching 4.8 LD on 25 March.
MPEC 2008-F43 - "15:33 UT" - 2008 FJ
- K08F00J 2008 FJ (small asteroid, H=24.8 ~37m) was discovered at 0549 UT on 27 March by MLS, which observed it at March 27.24-33p7 and 28.27p4.
MPEC 2008-F42 - "15:27 UT" - 2008 FH
- K08F00H 2008 FH (small asteroid, Earth MOID=7.0 LD, H=24.1 ~51m) was discovered at 0457 UT on 27 March by MLS, which observed it at March 27.21-26p8. The discovery was confirmed by Spacewatch 1.8m (March 28.15-16p3) and Grasslands Obs. (March 28.18-19p2).
MPEC 2008-F41 - "15:10 UT" - 2008 FG
- K08F00G 2008 FG (i=50.5°, H=19.2 ~490m) was discovered at 0319 UT on 27 March by Spacewatch 0.9m, which observed it at March 27.14-17p3. The discovery was confirmed by Spacewatch 1.8m (March 27.23-24p3 & 28.14-15p3) and Grasslands Obs. (March 28.21p2).
- Observations of risk-listed objects
- K08E09A 2008 EA9 (small asteroid, arc=21 days, H=27.7 ~10m) from Spacewatch 1.8m (March 27.26-27p3)
- Observations of recently (no longer) risk-listed objects
- K08E68V 2008 EV68 (small asteroid, arc=14 days, H=23.7 ~62m) from Astronomical Research Obs. (ARO) (March 25.15-17p3)
- K08E07M 2008 EM7 (arc=19 days, H=21.2 ~195m) from ARO (March 25.12-14p2 at V=22.1)
- K08D22W 2008 DW22 (small asteroid, arc=28 days, H=25.6 ~26m) from Spacewatch 1.8m (March 27.47-48p3)
- Observations of small asteroids (H>22.0)
- K08E85E 2008 EE85 (arc=13 days, H=22.7 ~98m) from Madonna di Dossobuono Obs. (March 25.91p3)
- K08E05W 2008 EW5 (arc=23 days, H=24.1 ~51m) from Spacewatch 1.8m (March 27.41-42p3)
- K08D00X 2008 DX (arc=30 days, H=23.8 ~59m) from Spacewatch 1.8m (March 27.45-46p2)
- Observations of other objects
- K08E85M 2008 EM85 (arc=12 days, H=19.7 ~389m) from Hormersdorf Obs. (March 26.85p3)
- K08E09J 2008 EJ9 (i=40.6°, arc=4 days, H=21.0 ~214m) from EURONEAR via La Silla (March 13.34-35p7)
- K08E09B 2008 EB9 (arc=19 days, H=20.4 ~282m) from ARO (March 25.09-10p3)
- K08E05Y 2008 EY5 (q=0.234 AU, arc=21 days, H=20.1 ~323m) from ARO (March 25.05p3)
- K08D23H 2008 DH23 (arc=27 days, H=19.7 ~389m) from Spacewatch 1.8m (March 27.25-26p3)
- K08B22C 2008 BC22 (arc=76 days, H=19.8 ~371m) from LINEAR (March 27.37-42p5)
- K07P25H 2007 PH25 (i=53.2°, Q=4.605 AU, arc=2 opp, H=16.6 ~1.62 km) from Spacewatch 1.8m (March 27.49-50p3)
- K05M13P 2005 MP13 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (March 27.44-45p3)
- K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from Spacewatch 0.9m (March 27.18-22p3)
- H9806 179806 2002 TD66 from LINEAR (March 27.33-35p3)
- H7049 177049 2003 EE16 from MLS (March 27.18-20p4)
- G2173 162173 1999 JU3 from EURONEAR/La Silla (March 13.04-05p8)
- D8205 138205 2000 EZ148 from Spacewatch 0.9m (March 27.19-23p3)
- D6618 136618 1994 CN2 from Spacewatch 0.9m (March 27.19-23p3)
- 86667 86667 2000 FO10 from LINEAR (March 27.43-48p4)
- 11054 11054 1991 FA from Spacewatch 0.9m (March 27.41-45p3)
- 09400 9400 1994 TW1 from LINEAR (March 27.37-42p5)
- 05836 5836 1993 MF from LINEAR (March 27.37-42p5)
- 03552 3552 Don Quixote (1983 SA) from Spacewatch 0.9m (March 27.13-16p3)
- 03288 3288 Seleucus (1982 DV) from LINEAR (March 27.19-23p5)
- 01620 1620 Geographos (1951 RA) from Sabadell Obs. (March 17.84p1 & 20.82p1)
Observers on 28 March '08
Fourteen observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|H55||Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2008-F40 -- 2008 EY5, 2008 EV68, 2008 EM7, 2008 EB9|
|651||Grasslands Obs. in Arizona, 3 in MPECs 2008-F41, 2008-F42 & 2008-F47 -- 2008 FO, 2008 FH, 2008 FG|
|H51||Greiner Research Obs. in Wisconsin, 1 in MPEC 2008-F47 -- 2008 FO|
|A35||Hormersdorf Obs. in Germany, 1 in MPEC 2008-F40 -- 2008 EM85|
|704||LINEAR in New Mexico, 7 in MPECs 2008-F40 & 2008-F47 -- 2008 FO, 2008 BC22, 86667, 179806, 9400, 5836, 3288|
|809|||EURONEAR via La Silla in Chile, 2 in MPEC 2008-F40 -- 2008 EJ9, 162173|
|560||Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2008-F40 -- 2008 EE85|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2008-F40, 2008-F42, 2008-F43, 2008-F45, 2008-F46, 2008-F47 & 2008-F48 -- 2008 FP, 2008 FO, 2008 FN, 2008 FM, 2008 FJ, 2008 FH, 177049|
|619||Sabadell Obs. in Spain, 1 in MPEC 2008-F40 -- 1620|
|854||Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-F48 -- 2008 FP|
|691||Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2008-F40, 2008-F41 & 2008-F44 -- 2008 FK, 2008 FG, 2004 CR2, 138205, 136618, 11054, 3552|
|291||Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2008-F40, 2008-F41, 2008-F42, 2008-F44, 2008-F45 & 2008-F46 -- 2008 FN, 2008 FM, 2008 FK, 2008 FH, 2008 FG, 2008 EW5, 2008 EA9, 2008 DX, 2008 DW22, 2008 DH23, 2007 PH25, 2005 MP13|
|6735||Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-F47 -- 2008 FO|
|6739||Heath Rhoades via Table Mtn. Obs. in southern California, 1 in MPEC 2008-F47 -- 2008 FO|
|F85||Tiki Obs. in Tahiti, 2 in MPECs 2008-F47 & 2008-F48 -- 2008 FP, 2008 FO|
Impact Risk Monitoring on 28 March '08
Notes for Today's Latest Risk Assessments
|2008 FK||JPL Sentry||1959||2036||1||8.6e-07||-6.84||-6.84||0||JPL: "Analysis based on 11 observations spanning 1.0273 days (2008-Mar-27.25247 to 2008-Mar-28.27974)." Diameter approximately 0.012 km. from mean, weighted H=27.3.|
|2008 EA9||NEODyS||1447||2063-2089||24||4.78e-05||-6.01||-6.46||0||NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/27.271."|
|JPL Sentry||1446||2068-2106||5||4.3e-05||-6.07||-6.44||0||JPL: "Analysis based on 42 observations spanning 20.865 days (2008-Mar-06.40551 to 2008-Mar-27.27057)." Diameter approximately 0.010 km. from mean, weighted H=27.7.|
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 28 March '08
Times are UTC for when items were noted or added by The Tracking News.
|1959||Noted that JPL Sentry has posted 2008 FK as an impact risk - see above|
|1714||Grabbed MPEC 2008-F48 - 2008 FP - see above|
|1625||Grabbed MPEC 2008-F42 - 2008 FH - see above|
Grabbed MPEC 2008-F43 - 2008 FJ - see above
Grabbed MPEC 2008-F44 - 2008 FK - see above
Grabbed MPEC 2008-F45 - 2008 FM - see above
Grabbed MPEC 2008-F46 - 2008 FN - see above
Grabbed MPEC 2008-F47 - 2008 FO - see above
|1515||Grabbed MPEC 2008-F41 - 2008 FG - see above|
|1447||Noted that NEODyS has updated its 2008 EA9 risk assessment - see above|
Grabbed MPEC 2008-F40 - Daily Orbit Update - see above
|1446||Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above|