Contents on 1 March '08
- IAU Minor Planet Center
- NEOCP Activity -- 16 listings: 3 new, 13 updated
- New MPECs -- ten MPECs
- Observers -- 21 observing facilities
- Impact Risk Monitoring -- nine 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 1 March '08
The MPC's NEO Confirmation Page has 16 listings: 3 new, 13 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and thirteen updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 33 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 1 March '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-E01 time-stamped "03:39 UT" - 2008 DG17 - see below
- MPEC 2008-E02 time-stamped "07:08 UT" - Daily Orbit Update - see below
- MPEC 2008-E03 time-stamped "15:04 UT" - 2008 DT22 - see below
- MPEC 2008-E04 time-stamped "15:06 UT" - 2008 DU22 - see below
- MPEC 2008-E05 time-stamped "15:10 UT" - 2008 DV22 - see below
- MPEC 2008-E06 time-stamped "15:12 UT" - 2008 DW22 - see below
- MPEC 2008-E07 time-stamped "15:15 UT" - 2008 DX22 - see below
- MPEC 2008-E08 time-stamped "15:18 UT" - 2008 DY22 - see below
- MPEC 2008-E09 time-stamped "16:23 UT" - Comet C/2007 T1 (McNaught) - see below
- MPEC 2008-E10 time-stamped "16:33 UT" - Comet C/2007 W1 (Boattini)
MPEC 2008-E10 - "16:33 UT" - Comet C/2007 W1 (Boattini)
- CK07W010 C/2007 W1 (Boattini) (i=9.9°, q=0.850 AU, TP=2008 June 24.88234 TT) from Auckland Obs. (Feb. 26.57-58p3), the Catalina Sky Survey (CSS) (Feb. 28.42-44p4), the Spacewatch 0.9m telescope (Feb. 29.42-46p3), and Atlante Obs. (March 1.08-09p3)
MPEC 2008-E09 - "16:23 UT" - Comet C/2007 T1 (McNaught)
- CK07T010 C/2007 T1 (McNaught) (i=117.6°, q=0.969 AU, Q=7734.666 AU, TP=2007 Dec. 12.52962 TT) from Auckland Obs. (Feb. 26.36p3 & 28.38p3) and the Siding Spring Survey (SSS) (Feb. 29.51-54p4)
MPEC 2008-E08 - "15:18 UT" - 2008 DY22
- K08D22Y 2008 DY22 (small asteroid, Earth MOID=5.9 LD, H=24.1 ~51m) was discovered at 1035 UT on 29 Feb. by CSS, which observed it at Feb. 29.44-55p24. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (March 1.50-51p3). This object is now within ten lunar distances (LD) of Earth, reaching 6.4 LD on 3 March.
MPEC 2008-E07 - "15:15 UT" - 2008 DX22
- K08D22X 2008 DX22 (risk-listed, Earth MOID=8.9 LD, H=24.5 ~43m) was discovered at 0652 UT on 29 Feb. by MLS, which observed it at Feb. 29.29-36p8 and March 1.29p3. The discovery was confirmed by Powell Obs. (March 1.27-28p5).
MPEC 2008-E06 - "15:12 UT" - 2008 DW22
- K08D22W 2008 DW22 (risk-listed, H=25.4 ~28m) was discovered at 0748 UT on 28 Feb. by MLS, which observed it at Feb. 28.29-35p8 at V=22.4-6 and March 1.38-40p4.
MPEC 2008-E05 - "15:10 UT" - 2008 DV22
- K08D22V 2008 DV22 (small asteroid, Q=4.379 AU, H=23.5 ~68m) was discovered at 0659 UT on 28 Feb. by MLS, which observed it at Feb. 28.29-37p7. The discovery was confirmed by the Spacewatch 1.8m telescope (March 1.38-39p2).
MPEC 2008-E04 - "15:06 UT" - 2008 DU22
- K08D22U 2008 DU22 (small asteroid, Earth MOID=2.2 LD, H=26.3 ~19m) was discovered at 0639 UT on 28 Feb. by LINEAR, which observed it at Feb. 28.28-32p4 and 29.21-26p5. The discovery was confirmed by Sabino Canyon Obs. (March 1.23p5) and Powell Obs. (March 1.26p3). This object is now within ten lunar distances (LD) of Earth, reaching 3.1 LD on 2 March.
MPEC 2008-E03 - "15:04 UT" - 2008 DT22
- K08D22T 2008 DT22 (small asteroid, H=23.5 ~68m) was discovered at 0611 UT on 28 Feb. by MLS, which observed it at Feb. 28.22-27p7. The discovery was confirmed by Spacewatch 1.8m (March 1.27-28p3).
<< DOU on 1 Mar. '08 >> MPEC 2008-E02 - "07:08 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08D05K 2008 DK5 (arc=1 day, H=21.3 ~186m) from Junk Bond Obs. (Feb. 29.41-42p4)
- K08D04G 2008 DG4 (small asteroid, Q=4.066 AU, arc=2 days, H=23.8 ~59m) from Astronomical Research Obs. (ARO) (Feb. 28.15-16p5) and Spacewatch 1.8m (Feb. 29.44-45p3)
- K08D04A 2008 DA4 (small asteroid, arc=2 days, H=24.0 ~54m) from Spacewatch 1.8m (Feb. 29.46-47p3)
- K08D00V 2008 DV (arc=3 days, H=18.3 ~741m) from ARO (Feb. 28.03-04p3) and Spacewatch 1.8m (Feb. 29.17-18p2)
- K08D00B 2008 DB (small asteroid, arc=11 days, H=25.6 ~26m) from Spacewatch 1.8m (Feb. 29.48-49p3)
- Observations of recently (no longer) risk-listed objects
- K08CB9G 2008 CG119 (i=41.3°, arc=16 days, H=19.0 ~537m) from SSS (Feb. 29.50p2)
- K08C22D 2008 CD22 (small asteroid, arc=20 days, H=22.1 ~129m) from CSS (Feb. 29.22-24p4)
- K08B18T 2008 BT18 (arc=29 days, H=18.4 ~708m) from LINEAR (Feb. 29.21-26p5)
- Observations of small asteroids (H>22.0)
- K08D05F 2008 DF5 (i=41.9°, arc=1 day, H=23.4 ~71m) from LINEAR (Feb. 29.10-19p9)
- K08CB8X 2008 CX118 (arc=16 days, H=24.4 ~45m) from ARO (Feb. 28.13-15p2 at V=22.4-5)
- K08C70H 2008 CH70 (arc=19 days, H=24.4 ~45m) from ARO (Feb. 28.07-09p3 at V=22.5-6)
- K07D00A 2007 DA (arc=2 opp, H=22.4 ~112m) from MLS (Feb. 29.35-36p3)
- Observations of other objects
- K08D00W 2008 DW (arc=3 days, H=21.6 ~162m) from Spacewatch 0.9m (Feb. 29.25-29p3)
- K08C01N 2008 CN1 (arc=27 days, H=20.6 ~257m) from University Hills Obs. (Feb. 29.26-27p6) and Hamamatsu-Yuto Obs. (Feb. 29.51-54p6)
- K08C01L 2008 CL1 (arc=28 days, H=19.4 ~446m) from University Hills Obs. (Feb. 29.35-36p6) and Atlante Obs. (March 1.01-02p3)
- K08B02U 2008 BU2 (i=38.4°, q=0.360 AU, arc=40 days, H=18.4 ~708m) from ARO (Feb. 28.10-12p3 at V=22.3)
- K08AB0Z 2008 AZ110 (Q=4.029 AU, arc=2 opp, H=18.3 ~741m) from ARO (Feb. 28.12-13p3)
- K08A28V 2008 AV28 (arc=71 days, H=19.5 ~426m) from ARO (Feb. 28.04-05p2)
- K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from CSS (Feb. 29.22-24p4)
- K07T24U 2007 TU24 (arc=141 days, H=20.3 ~295m) from CSS (Feb. 29.32-34p4)
- K07T08G 2007 TG8 (Q=4.306 AU, arc=168 days, H=18.6 ~645m) from Bornheim Obs. (Feb. 10.96p3)
- K06D62U 2006 DU62 (arc=3 opp, H=18.0 ~851m) from University Hills Obs. (Feb. 29.27-28p6) and Atlante Obs. (Feb. 29.95-96p3)
- K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from Hamamatsu-Yuto Obs. (Feb. 29.48-50p6)
- K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from CSS (Feb. 29.22-25p4)
- K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from Spacewatch 0.9m (Feb. 29.25-29p3)
- K03Y94Q 2003 YQ94 (Q=4.293 AU, arc=2 opp, H=17.6 ~1.02 km) from MLS (Feb. 29.15-17p4)
- K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Terskol Obs. (Feb. 28.79-80p25) and Hamamatsu-Yuto Obs. (Feb. 29.55-58p5)
- H5921 175921 2000 DM1 from MLS (Feb. 29.37-39p4)
- G4222 164222 2004 RN9 from CSS (Feb. 29.32-35p4 & 29.44-46p4)
- G2038 162038 1996 DH from Goodricke-Pigott Obs. (Feb. 28.21-23p3)
- F9495 159495 2000 UV16 from MLS (Feb. 29.13-14p4)
- F3591 153591 2001 SN263 from Terskol Obs. (Feb. 26.69p11 & 28.78-79p16), Hamamatsu-Yuto Obs. (Feb. 29.61-62p13), Huelva Obs. (Feb. 29.80-83p3), and Atlante Obs. (Feb. 29.97-98p3)
- F2931 152931 2000 EA107 from La Fecha Obs. (Feb. 29.88-91p2 & 29.96p1)
- D8947 138947 2001 BA40 from LINEAR (Feb. 29.18-20p3)
- D8127 138127 2000 EE14 from LINEAR (Feb. 29.11-15p5)
- 66251 66251 1999 GJ2 from LINEAR (Feb. 29.16-19p3)
- 53789 53789 2000 ED104 from SSS (Feb. 29.75-77p3)
- 40267 40267 1999 GJ4 from CSS (Feb. 29.32-34p4)
- 39565 39565 1992 SL from MLS (Feb. 29.35-36p4)
- 18736 18736 1998 NU from Spacewatch 1.8m (Feb. 29.14-15p3) and MLS (Feb. 29.15-19p8)
- 11398 11398 1998 YP11 from CSS (Feb. 29.33-34p3)
- 05587 5587 1990 SB from CSS (Feb. 29.18-20p4)
- 03554 3554 Amun (1986 EB) from La Fecha Obs. (Feb. 29.85-86p3)
- 03288 3288 Seleucus (1982 DV) from LINEAR (Feb. 29.22-27p5)
- 03102 3102 Krok (1981 QA) from MLS (Feb. 29.25-27p4)
- 01685 1685 Toro (1948 OA) from Sant Cugat del Valles Obs. (Feb. 29.80-82p2)
- 01620 1620 Geographos (1951 RA) from Atlante Obs. (Feb. 29.90-91p3)
MPEC 2008-E01 - "03:39 UT" - 2008 DG17
- K08D17G 2008 DG17 (i=40.9°, H=19.8 ~371m) was discovered at 0333 UT on 29 Feb. by CSS, which observed it at Feb. 29.15-21p10. The discovery was confirmed by Grasslands Obs. (Feb. 29.22p3), MLS (Feb. 29.23-24p8), and Spacewatch 1.8m (March 1.13-14p3).
Observers on 1 March '08
A total of 21 observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| H55 | Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-E02 -- 2008 DV, 2008 DG4, 2008 CX118, 2008 CH70, 2008 BU2, 2008 AZ110, 2008 AV28 |
| J51 | Atlante Obs. in the Canary Islands, 5 in MPECs 2008-E02 & 2008-E10 -- 2008 CL1, C/2007 W1, 2006 DU62, 153591, 1620 |
| 467 | Auckland Obs. in New Zealand, 2 in MPECs 2008-E09 & 2008-E10 -- C/2007 W1, C/2007 T1 |
| 127 | Bornheim Obs. in Germany, 1 in MPEC 2008-E02 -- 2007 TG8 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-E01, 2008-E02, 2008-E08 & 2008-E10 -- 2008 DY22, 2008 DG17, 2008 CD22, 2007 YK, C/2007 W1, 2007 TU24, 2005 BE2, 40267, 164222, 11398, 5587 |
| 683 | Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E02 -- 162038 |
| 651 | Grasslands Obs. in Arizona, 1 in MPEC 2008-E01 -- 2008 DG17 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-E02 -- 2008 CN1, 2005 EK70, 2002 TD66, 153591 |
| J37 | Huelva Obs. in Spain, 1 in MPEC 2008-E02 -- 153591 |
| 701 | Junk Bond Obs. in Arizona, 1 in MPEC 2008-E02 -- 2008 DK5 |
| 704 | LINEAR in New Mexico, 7 in MPECs 2008-E02 & 2008-E04 -- 2008 DU22, 2008 DF5, 2008 BT18, 66251, 138947, 138127, 3288 |
| J34 | La Fecha Obs. in Spain, 2 in MPEC 2008-E02 -- 152931, 3554 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2008-E01, 2008-E02, 2008-E03, 2008-E05, 2008-E06, 2008-E07 & 2008-E08 -- 2008 DY22, 2008 DX22, 2008 DW22, 2008 DV22, 2008 DT22, 2008 DG17, 2007 DA, 2003 YQ94, 39565, 18736, 175921, 159495, 3102 |
| 649 | Powell Obs. in Kansas, 2 in MPECs 2008-E04 & 2008-E07 -- 2008 DX22, 2008 DU22 |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-E04 -- 2008 DU22 |
| B61 | Sant Cugat del Valles Obs., 1 in MPEC 2008-E02 -- 1685 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-E02 & 2008-E09 -- 2008 CG119, C/2007 T1, 53789 |
| 691 | Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-E02 & 2008-E10 -- 2008 DW, C/2007 W1, 2004 CR2 |
| 291 | Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-E01, 2008-E02, 2008-E03 & 2008-E05 -- 2008 DV22, 2008 DV, 2008 DT22, 2008 DG4, 2008 DG17, 2008 DB, 2008 DA4, 18736 |
| B18 | Terskol Obs., 2 in MPEC 2008-E02 -- 2002 TD66, 153591 |
| G72 | University Hills Obs. in southern California, 3 in MPEC 2008-E02 -- 2008 CN1, 2008 CL1, 2006 DU62 |
Impact Risk Monitoring on 1 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 DX22 | JPL Sentry | 1738 | 2010-2077 | 4 | 8.8e-10 | -7.73 | -7.79 | 0 | JPL: "Analysis based on 16 observations spanning 1.0055 days (2008-Feb-29.28655 to 2008-Mar-01.29205)." Diameter approximately 0.038 km. from mean, weighted H=24.8. |
| 2008 DW22 | JPL Sentry | 1702 | 2028-2100 | 6 | 2.2e-09 | -8.37 | -8.77 | 0 | JPL: "Analysis based on 12 observations spanning 2.1097 days (2008-Feb-28.28619 to 2008-Mar-01.3959)." Diameter approximately 0.040 km. from mean, weighted H=24.6. |
| 2008 DK5 | JPL Sentry | 1526 | R E M O V E D | JPL: Risk listing removed at 1057 UTC. | |||||
| 2008 DJ5 | NEODyS | 1528 | 2010-2090 | 47 | 2.49e-08 | -5.24 | -5.85 | 0 | NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/02/28.405 to 2008/02/29.446." |
| 2008 DG5 | NEODyS | 1738 | 2013-2090 | 88 | 1.05e-07 | -3.93 | -4.69 | 0 | NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/28.279 to 2008/02/29.343." |
| 2008 DG4 | JPL Sentry | 1526 | R E M O V E D | JPL: Risk listing removed at 1131 UTC. | |||||
| NEODyS | 1526 | R E M O V E D | |||||||
| 2008 DA4 | NEODyS | 1527 | 2080-2088 | 2 | 5.33e-08 | -6.97 | -7.14 | 0 | NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/02/27.281 to 2008/02/29.471." |
| JPL Sentry | 1526 | 2080-2100 | 4 | 9.3e-07 | -5.76 | -5.87 | 0 | JPL: "Analysis based on 22 observations spanning 2.1893 days (2008-Feb-27.28072 to 2008-Feb-29.46998)." Diameter approximately 0.053 km. from mean, weighted H=24.0. | |
| 2008 DV | NEODyS | 1526 | R E M O V E D | ||||||
| 2008 DB | NEODyS | 1528 | 2046-2089 | 29 | 3.17e-05 | -4.89 | -4.96 | 0 | NEODyS: "Based on 56 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/29.487." |
| JPL Sentry | 1526 | 2046-2108 | 24 | 5.1e-05 | -4.70 | -4.77 | 0 | JPL: "Analysis based on 55 observations spanning 11.244 days (2008-Feb-18.242 to 2008-Feb-29.48596)." Diameter approximately 0.025 km. from mean, weighted H=25.7. | |
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 1 March '08
Times are UTC for when items were noted or added by The Tracking News.
| 1738 | Noted that NEODyS has posted 2008 DG5 as an impact risk - see above Noted that JPL Sentry has posted 2008 DX22 as an impact risk - see above |
| 1702 | Noted that JPL Sentry has posted 2008 DW22 as an impact risk - see above Grabbed MPEC 2008-E10 - Comet C/2007 W1 (Boattini) - see above |
| 1632 | Grabbed MPEC 2008-E09 - Comet C/2007 T1 (McNaught) - see above |
| 1528 | Noted that NEODyS has updated its 2008 DB risk assessment - see above |
| 1527 | Noted that NEODyS has updated its 2008 DA4 risk assessment - see above Grabbed MPEC 2008-E02 - Daily Orbit Update - see above |
| 1526 | Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above Noted that JPL Sentry has updated its 2008 DB risk assessment - see above Noted that JPL Sentry has removed 2008 DG4 as an impact risk - see above Noted that NEODyS has removed 2008 DG4 as an impact risk - see above Noted that NEODyS has posted 2008 DJ5 as an impact risk - see above Noted that JPL Sentry has removed 2008 DK5 as an impact risk - see above Noted that NEODyS has removed 2008 DV as an impact risk - see above Grabbed MPEC 2008-E03 - 2008 DT22 - see above Grabbed MPEC 2008-E04 - 2008 DU22 - see above Grabbed MPEC 2008-E05 - 2008 DV22 - see above Grabbed MPEC 2008-E06 - 2008 DW22 - see above Grabbed MPEC 2008-E07 - 2008 DX22 - see above Grabbed MPEC 2008-E08 - 2008 DY22 - see above |
| 0552 | Grabbed MPEC 2008-E01 - 2008 DG17 - see above |
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