Contents on 22 January '08
- IAU Minor Planet Center
- Impact Risk Monitoring -- one object
- 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 22 January '08
The MPC's NEO Confirmation Page has 2 listings: 2 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters."
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 22 January '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-B28 time-stamped "07:09 UT" - Daily Orbit Update - see below
- MPEC 2008-B29 time-stamped "12:36 UT" - 2008 BS2 - see below
- MPEC 2008-B30 time-stamped "12:49 UT" - 2008 BT2 - see below
- MPEC 2008-B31 time-stamped "12:53 UT" - 2008 BU2 - see below
- MPEC 2008-B32 time-stamped "12:57 UT" - 2008 BV2 - see below
- MPEC 2008-B33 time-stamped "13:01 UT" - 2008 BW2 - see below
- MPEC 2008-B34 time-stamped "13:06 UT" - 2008 BX2
MPEC 2008-B34 - "13:06 UT" - 2008 BX2
- K08B02X 2008 BX2 (small asteroid, H=23.6 ~65m) was discovered at 0718 UT on 20 Jan. by the Mt. Lemmon Survey (MLS), which observed it at Jan. 20.30-32p4, 20.40-41p4, 21.35-36p4, and 21.42p8. The discovery was confirmed by the Spacewatch 1.8m telescope (Jan. 20.47-48p3).
MPEC 2008-B33 - "13:01 UT" - 2008 BW2
- K08B02W 2008 BW2 (small asteroid, Earth MOID=1.0 LD, H=29.7 ~4m) was discovered at 0920 UT on 19 Jan. by the MLS, which observed it at Jan. 19.39-43p8, 19.50p4, and 20.35-36p4. This object is now within ten lunar distances (LD) of Earth, reaching 1.0 LD on 17 Jan.
MPEC 2008-B32 - "12:57 UT" - 2008 BV2
- K08B02V 2008 BV2 (small asteroid, H=22.9 ~89m) was discovered at 0608 UT on 19 Jan. by the MLS, which observed it at Jan. 19.26-27p4, 19.36-37p4 at V=22.3, 20.38-39p4, and 20.51p3. The discovery was confirmed by Spacewatch 1.8m (Jan. 20.29p3) and Astronomical Research Obs. (ARO) (Jan. 20.30-33p3).
MPEC 2008-B31 - "12:53 UT" - 2008 BU2
- K08B02U 2008 BU2 (i=38.5°, q=0.365 AU, H=18.4 ~708m) was discovered at 0604 UT on 19 Jan. by the MLS, which observed it at Jan. 19.25-27p4, 19.36-37p4, 20.25-26p3, 20.51p4, and 21.35-36p3. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Jan. 20.24p2), ARO (Jan. 20.27-28p3), Spacewatch 1.8m (Jan. 20.30-31p3), Jim Young via Table Mtn. Obs. (Jan. 20.32-33p4), and Desert Moon Obs. (Jan. 20.38-44p3).
MPEC 2008-B30 - "12:49 UT" - 2008 BT2
- K08B02T 2008 BT2 (small asteroid, H=24.2 ~49m) was discovered at 0502 UT on 18 Jan. by the MLS, which observed it at Jan. 18.21-22p4, 18.27-28p2, 19.28-29p4, and 20.26-27p4. The discovery was confirmed by Spacewatch 1.8m (Jan. 19.21-22p3) and ARO (Jan. 20.16-19p2).
MPEC 2008-B29 - "12:36 UT" - 2008 BS2
- K08B02S 2008 BS2 (H=18.4 ~708m) was discovered at 0457 UT on 18 Jan. by the Spacewatch 0.9m telescope, which observed it at Jan. 18.21p1 and 18.25-27p2. The discovery was confirmed by Spacewatch 1.8m (Jan. 18.37-38p3, 19.26-27p3, 20.25-27p3 & 20.41-42p3), MLS (Jan. 19.28-29p4 & 20.26-27p4), and ARO (Jan. 20.20-23p3).
- Observations of risk-listed objects
- K08A04F 2008 AF4 (arc=11 days, H=19.7 ~389m) from Petit Jean Mtn. South Obs. (PJMSO) (Jan. 21.32-33p8)
- Observations of recently (no longer) risk-listed objects
- K07Y02B 2007 YB2 (Q=5.233 AU, arc=34 days, H=18.3 ~741m) from PJMSO (Jan. 21.40-41p8)
- Observations of small asteroids (H>22.0)
- K08A04G 2008 AG4 (arc=11 days, H=24.7 ~39m) from MLS (Jan. 21.35-36p4)
- Observations of other objects
- K05X01D 2005 XD1 (arc=2 opp, H=19.4 ~446m) from PJMSO (Jan. 21.24p6)
- K03B35T 2003 BT35 (i=57.3°, arc=3 opp, H=18.6 ~645m) from PJMSO (Jan. 21.31-32p6)
- K00C59H 2000 CH59 (arc=3 opp, H=19.8 ~371m) from PJMSO (Jan. 21.30-31p6)
- G2741 162741 2000 WG6 from MLS (Jan. 21.17-18p8)
- F3591 153591 2001 SN263 from PJMSO (Jan. 21.28p7)
- D6793 136793 1997 AQ18 from PJMSO (Jan. 21.28-29p5)
- 03691 3691 Bede (1982 FT) from PJMSO (Jan. 21.38p5)
- 01620 1620 Geographos (1951 RA) from PJMSO (Jan. 21.34-35p5)
Observers on 22 January '08
Eight observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|H55||Astronomical Research Obs. (ARO) in Illinois, 4 in MPECs 2008-B29, 2008-B30, 2008-B31 & 2008-B32 -- 2008 BV2, 2008 BU2, 2008 BT2, 2008 BS2|
|448||Desert Moon Obs. in New Mexico, 1 in MPEC 2008-B31 -- 2008 BU2|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-B31 -- 2008 BU2|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2008-B28, 2008-B29, 2008-B30, 2008-B31, 2008-B32, 2008-B33 & 2008-B34 -- 2008 BX2, 2008 BW2, 2008 BV2, 2008 BU2, 2008 BT2, 2008 BS2, 2008 AG4, 162741|
|H45||Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2008-B28 -- 2008 AF4, 2007 YB2, 2005 XD1, 2003 BT35, 2000 CH59, 153591, 136793, 3691, 1620|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-B29 -- 2008 BS2|
|291||Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2008-B29, 2008-B30, 2008-B31, 2008-B32 & 2008-B34 -- 2008 BX2, 2008 BV2, 2008 BU2, 2008 BT2, 2008 BS2|
|6735||Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-B31 -- 2008 BU2|
Impact Risk Monitoring on 22 January '08
Notes for Today's Latest Risk Assessments
|2008 AF4||JPL Sentry||1637||2089-2099||24||1.8e-05||-2.46||-2.81||0||JPL: "Analysis based on 205 observations spanning 10.938 days (2008-Jan-10.39652 to 2008-Jan-21.33477)." Diameter approximately 0.380 km. from mean, weighted H=19.7.|
|NEODyS||1637||2078-2090||12||8.82e-06||-2.74||-2.80||0||NEODyS: "Based on 208 optical observations (of which 3 are rejected as outliers) from 2008/01/10.397 to 2008/01/21.336."|
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 22 January '08
Times are UTC for when items were noted or added by The Tracking News.
|1637||Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above|
Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Grabbed MPEC 2008-B28 - Daily Orbit Update - see above
Grabbed MPEC 2008-B29 - 2008 BS2 - see above
Grabbed MPEC 2008-B30 - 2008 BT2 - see above
Grabbed MPEC 2008-B31 - 2008 BU2 - see above
Grabbed MPEC 2008-B32 - 2008 BV2 - see above
Grabbed MPEC 2008-B33 - 2008 BW2 - see above
Grabbed MPEC 2008-B34 - 2008 BX2 - see above