Contents on 27 March '08
- IAU Minor Planet Center
- NEOCP Activity -- seven listings: 7 updated
- New MPECs -- six MPECs
- Observers -- nineteen observing facilities
- Impact Risk Monitoring -- four 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
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 27 March '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 eight 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 27 March '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been six MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-F34 time-stamped "02:22 UT" - 2008 EN82 - see below
- MPEC 2008-F35 time-stamped "06:06 UT" - Daily Orbit Update - see below
- MPEC 2008-F36 time-stamped "14:30 UT" - Comet C/2008 E1 (Catalina) - see below
- MPEC 2008-F37 time-stamped "15:08 UT" - 2008 FE - see below
- MPEC 2008-F38 time-stamped "16:58 UT" - Comets C/2007 C11, 2007 D4, 2007 D5, 2007 E4, 2007 E5, 2007 F5, 2007 Y10 (SOHO) - see below
- MPEC 2008-F39 time-stamped "18:44 UT" - 2006 OY10
MPEC 2008-F39 - "18:44 UT" - 2006 OY10
- K06O10Y 2006 OY10 (H=18.7 ~616m) from David Tholen's team on Mauna Kea (Jan. 8.54-56p3 at R=22.7-8 & 9.54-56p3 at R=22.9)
MPEC 2008-F38 - "16:58 UT" - Comets C/2007 C11, 2007 D4, 2007 D5, 2007 E4, 2007 E5, 2007 F5, 2007 Y10 (SOHO)
- CK07Y100 C/2007 Y10 from the SECCHI HI1-A instrument (4) aboard STEREO-A (2007 Dec. 28.21-41p16 & 2007 Dec. 28.46-41p70)
- CK07F050 C/2007 F5 from STEREO-A/HI1-A (4) (2007 March 29.13-24p10 & 2007 March 29.38-52p12)
- CK07E050 C/2007 E5 from STEREO-A/HI1-A (4) (2007 March 9.26p2, 2007 March 9.34p2 & 2007 March 9.43p2)
- CK07E040 C/2007 E4 from STEREO-A/HI1-A (4) (2007 March 2.45-57p10 & 2007 March 2.70p2)
- CK07D050 C/2007 D5 from STEREO-A/HI1-A (4) (2007 Feb. 18.34p2, 2007 Feb. 18.43p2 & 2007 Feb. 18.51p2)
- CK07D040 C/2007 D4 from STEREO-A/HI1-A (4) (2007 Feb. 16.26p2, 2007 Feb. 16.34p2, 2007 Feb. 16.43p2, 2007 Feb. 16.51p2 & 2007 Feb. 16.59p2)
- CK07C110 C/2007 C11 from STEREO-A/HI1-A (4) (2007 Feb. 7.26p2, 2007 Feb. 7.34p2, 2007 Feb. 7.43p2, 2007 Feb. 7.51p2, 2007 Feb. 7.59p2, 2007 Feb. 7.68p2 & 2007 Feb. 7.76p2)
MPEC 2008-F37 - "15:08 UT" - 2008 FE
- K08F00E 2008 FE (small asteroid, H=24.1 ~51m) was discovered at 0451 UT on 26 March by the Mt. Lemmon Survey (MLS), which observed it at March 26.20-27p6 and 27.12-14p4. The discovery was confirmed by Great Shefford Obs. (March 27.03-04p3).
MPEC 2008-F36 - "14:30 UT" - Comet C/2008 E1 (Catalina)
- CK08E010 C/2008 E1 (Catalina) (Centaur, q=4.830 AU, Q=16.513 AU, TP=2008 Aug. 10.97805 TT) from the Catalina Sky Survey (CSS) (2007 Nov. 13.38-40p4) and Auckland Obs. (March 27.32-37p11)
<< DOU on 27 Mar. '08 >> MPEC 2008-F35 - "06:06 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08E09A 2008 EA9 (small asteroid, arc=19 days, H=27.7 ~10m) from EURONEAR via La Silla (March 13.38-39p5)
- K08E07R 2008 ER7 (arc=21 days, H=20.0 ~339m) from the Spacewatch 1.8m telescope (March 27.19-20p3)
- K08E05X 2008 EX5 (small asteroid, arc=23 days, H=23.8 ~59m) from Spacewatch 1.8m (March 27.21p2)
- K08D04A 2008 DA4 (small asteroid, arc=15 days, H=23.9 ~56m) from EURONEAR/La Silla (March 13.27-28p8)
- Observations of recently (no longer) risk-listed objects
- K08E07M 2008 EM7 (arc=19 days, H=21.2 ~195m) from EURONEAR/La Silla (March 11.23-26p15)
- K08E06N 2008 EN6 (arc=22 days, H=19.2 ~490m) from Spacewatch 1.8m (March 27.18-19p3)
- K08D05K 2008 DK5 (arc=27 days, H=21.4 ~178m) from Desert Moon Obs. (March 26.30-34p3)
- K08D05J 2008 DJ5 (arc=27 days, H=19.9 ~355m) from Desert Moon Obs. (March 26.20-26p3)
- K08D00Y 2008 DY (Q=4.349 AU, arc=29 days, H=20.7 ~245m) from Desert Moon Obs. (March 26.48-50p3)
- Observations of small asteroids (H>22.0)
- K08F00B 2008 FB (arc=4 days, H=23.4 ~71m) from Jim Young via Table Mtn. Obs. (March 27.13p2)
- K08E85E 2008 EE85 (arc=13 days, H=22.7 ~98m) from Lumezzane Obs. (March 25.90-91p4)
- K08E84X 2008 EX84 (arc=14 days, H=22.4 ~112m) from Lumezzane Obs. (March 25.95-96p3)
- K08E07Q 2008 EQ7 (arc=20 days, H=22.6 ~102m) from Desert Moon Obs. (March 26.42-46p3)
- K08E07P 2008 EP7 (arc=21 days, H=23.6 ~65m) from Great Shefford Obs. (March 27.06-07p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08D05L 2008 DL5 (arc=26 days, H=21.9 ~141m) from EURONEAR/La Silla (March 13.32-33p8)
- K06F35V 2006 FV35 (arc=5 opp, H=21.8 ~148m) from MLS (March 26.34-36p4)
- Observations of other objects
- K08E82N 2008 EN82 (arc=5 opp, H=15.9 ~2.24 km, q=1.121 AU) from the Spacewatch 0.9m telescope (2004 March 27.24-27p2 & 2004 March 27.31p1) and MLS (2005 April 10.36-38p4)
- K08E09M 2008 EM9 (q=0.292 AU, arc=17 days, H=17.4 ~1.12 km) from Desert Moon Obs. (March 26.39-40p3)
- K08E09B 2008 EB9 (arc=19 days, H=20.4 ~282m) from Spacewatch 1.8m (March 27.15p3)
- K08B22C 2008 BC22 (arc=75 days, H=19.8 ~371m) from Balzaretto Obs. (March 25.97p1)
- K08B18T 2008 BT18 (arc=52 days, H=18.3 ~741m) from Astronomical Research Obs. (ARO) (March 23.14-15p2)
- K06B55G 2006 BG55 (arc=3 opp, H=18.3 ~741m) from Lumezzane Obs. (March 25.96-97p4)
- K05R34D 2005 RD34 (arc=2 opp, H=20.2 ~309m) from Spacewatch 0.9m (March 26.17-20p3)
- K05G21P 2005 GP21 (arc=2 opp, H=19.9 ~355m) from MLS (March 26.37-38p4)
- K04RA9Y 2004 RY109 (arc=3 opp, H=19.0 ~537m) from Spacewatch 0.9m (March 26.17-21p3)
- K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from Balzaretto Obs. (March 25.89-91p4) and Lumezzane Obs. (March 25.92p4)
- J93G00D 1993 GD (arc=4 opp, H=20.8 ~234m) from Desert Moon Obs. (March 26.11-16p3)
- E1495 141495 2002 EZ11 from MLS (March 26.34-36p4)
- A2873 102873 1999 WK11 from Spacewatch 0.9m (March 26.45-49p3)
- 86819 86819 2000 GK137 from Spacewatch 0.9m (March 26.17-21p3)
- 09162 9162 1987 OA from Lumezzane Obs. (March 25.97-98p4) and MLS (March 26.37-38p4)
- 05587 5587 1990 SB from Lumezzane Obs. (March 25.87-88p4)
- 04954 4954 Eric (1990 SQ) from Mt. Tuffley Obs. (March 27.06-07p3)
- 01866 1866 Sisyphus (1972 XA) from Malaga Obs. (March 23.99-00p3)
MPEC 2008-F34 - "02:22 UT" - 2008 EN82
Observers on 27 March '08
Nineteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. in Illinois, 1 in MPEC 2008-F35 -- 2008 BT18 |
| 467 | Auckland Obs. in New Zealand, 1 in MPEC 2008-F36 -- C/2008 E1 |
| A81 | Balzaretto Obs. in Italy, 2 in MPEC 2008-F35 -- 2008 BC22, 2003 GW |
| 703 | Catalina Sky Survey in Arizona, 1 in MPEC 2008-F36 -- C/2008 E1 |
| 448 | Desert Moon Obs. in New Mexico, 6 in MPEC 2008-F35 -- 2008 EQ7, 2008 EM9, 2008 DY, 2008 DK5, 2008 DJ5, 1993 GD |
| J95 | Great Shefford Obs. in England, 2 in MPECs 2008-F35 & 2008-F37 -- 2008 FE, 2008 EP7 |
| 809| | EURONEAR via La Silla in Chile, 4 in MPEC 2008-F35 -- 2008 EM7, 2008 EA9, 2008 DL5, 2008 DA4 |
| 130 | Lumezzane Obs. in Italy, 6 in MPEC 2008-F35 -- 2008 EX84, 2008 EE85, 2006 BG55, 2003 GW, 9162, 5587 |
| J40 | Malaga Obs. in Spain, 1 in MPEC 2008-F35 -- 1866 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F39 -- 2006 OY10 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-F35 & 2008-F37 -- 2008 FE, 2008 EN82, 2006 FV35, 2005 GP21, 141495, 9162 |
| J93 | Mt. Tuffley Obs. in England, 1 in MPEC 2008-F35 -- 4954 |
| 644 | NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-F34 -- 2008 EN82 |
| 608 | NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-F34 -- 2008 EN82 |
| C494 | SECCHI HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 7 in MPEC 2008-F38 -- C/2007 Y10, C/2007 F5, C/2007 E5, C/2007 E4, C/2007 D5, C/2007 D4, C/2007 C11 |
| 691 | Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2008-F35 -- 2008 EN82, 2005 RD34, 2004 RY109, 86819, 102873 |
| 291 | Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-F35 -- 2008 EX5, 2008 ER7, 2008 EN6, 2008 EB9 |
| 6735 | Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-F35 -- 2008 FB |
| F85 | Tiki Obs. in Tahiti, 1 in MPEC 2008-F34 -- 2008 EN82 |
Impact Risk Monitoring on 27 March '08
| 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 EA9 | NEODyS | 1500 | 2059-2090 | 21 | 5.0e-05 | -5.99 | -6.42 | 0 | NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/25.263." |
| JPL Sentry | 1459 | 2063-2081 | 5 | 5.1e-05 | -5.99 | -6.40 | 0 | JPL: "Analysis based on 39 observations spanning 18.856 days (2008-Mar-06.40551 to 2008-Mar-25.26184)." Diameter approximately 0.010 km. from mean, weighted H=27.7. | |
| 2008 ER7 | NEODyS | 1500 | 2077-2089 | 3 | 1.35e-06 | -3.45 | -3.53 | 0 | NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/27.199." |
| JPL Sentry | 1459 | 2077-2104 | 14 | 2.2e-06 | -3.27 | -3.54 | 0 | JPL: "Analysis based on 57 observations spanning 20.862 days (2008-Mar-06.33608 to 2008-Mar-27.19809)." Diameter approximately 0.330 km. from mean, weighted H=20.1. | |
| 2008 EX5 | NEODyS | 1500 | 2044-2090 | 57 | 2.67e-05 | -4.20 | -4.55 | 0 | NEODyS: "Based on 63 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/27.214." |
| JPL Sentry | 1459 | 2044-2083 | 34 | 2.7e-05 | -4.20 | -4.54 | 0 | JPL: "Analysis based on 62 observations spanning 22.818 days (2008-Mar-04.39523 to 2008-Mar-27.21361)." Diameter approximately 0.057 km. from mean, weighted H=23.9. | |
| 2008 DA4 | JPL Sentry | 1459 | 2091-2100 | 2 | 6.0e-07 | -5.98 | -6.07 | 0 | JPL: "Analysis based on 78 observations spanning 15.168 days (2008-Feb-27.28072 to 2008-Mar-13.44826)." Diameter approximately 0.056 km. from mean, weighted H=23.9. |
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 27 March '08
Times are UTC for when items were noted or added by The Tracking News.
| 1857 | Grabbed MPEC 2008-F38 - Comets C/2007 C11, 2007 D4, 2007 D5, 2007 E4, 2007 E5, 2007 F5, 2007 Y10 (SOHO) - see above Grabbed MPEC 2008-F39 - 2006 OY10 - see above |
| 1528 | Grabbed MPEC 2008-F37 - 2008 FE - see above |
| 1500 | Noted that NEODyS has updated its 2008 EA9 risk assessment - see above Noted that NEODyS has updated its 2008 ER7 risk assessment - see above Noted that NEODyS has updated its 2008 EX5 risk assessment - see above |
| 1459 | Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above Grabbed MPEC 2008-F35 - Daily Orbit Update - see above Grabbed MPEC 2008-F36 - Comet C/2008 E1 (Catalina) - see above |
| 0425 | Grabbed MPEC 2008-F34 - 2008 EN82 - see above |
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