Contents on 31 May '08
- IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- two MPECs
- Observers -- nineteen 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
NOTE: These news page will update less often and at sometimes irregular intervals from May 31st through approximately June 7th.
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 31 May '08
The MPC's NEO Confirmation Page has 1 listing: 1 updated
When last checked at 1628 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of four 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 31 May '08
Minor Planet Electronic Circulars
As of last check at 1628 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-K65 time-stamped "06:07 UT" - Daily Orbit Update - see below
- MPEC 2008-K66 time-stamped "12:23 UT" - 2008 KN11
MPEC 2008-K66 - "12:23 UT" - 2008 KN11
- K08K11N 2008 KN11 (risk-listed, Earth MOID=0.4 LD, H=23.0 ~85m) was discovered at 0801 UT on 30 May by the Mt. Lemmon Survey (MLS), which observed it at May 30.33-38p8. The discovery was confirmed by Mt. John Obs. (May 30.57-58p4), the Spacewatch 1.8m telescope (May 31.23-24p3), Ovidiu Vaduvescu via Cerro Tololo Inter-American Obs. (CTIO) (May 31.25-27p12), Grasslands Obs. (May 31.27p3), and Jim Bedient via Faulkes Telescope North (May 31.36-39p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.2 LD on 23 June.
<< DOU on 31 May '08 >> MPEC 2008-K65 - "06:07 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08K05Z 2008 KZ5 (arc=2 days, H=19.9 ~355m) from Astronomical Research Obs. (ARO) (May 30.27-29p3), Junk Bond Obs. (May 30.29-31p2 & 30.36-38p2), Mt. John Obs. (May 30.52-53p3), and Great Shefford Obs. (May 30.99-02p3)
- K08K02X 2008 KX2 (small asteroid, arc=1 day, H=24.7 ~39m) from ARO (May 30.25-26p3)
- K08K00T 2008 KT (small asteroid, arc=3 days, H=28.2 ~8m) from Great Shefford Obs. (May 30.91-92p4)
- K08K00O 2008 KO (small asteroid, arc=4 days, H=24.4 ~45m) from ARO (May 30.32-33p3), Alter Satzberg Obs. (May 30.95-98p5), and Great Shefford Obs. (May 30.96-98p5)
- K08H04U 2008 HU4 (small asteroid, arc=30 days, H=28.4 ~7m) from Spacewatch 1.8m (May 28.37-40p3, 29.38-41p3 & 30.34p2)
- K08A04F 2008 AF4 (arc=131 days, H=19.7 ~389m) from David Tholen's team on Mauna Kea (May 20.31-32p2 at R=21.9-22.1)
- Observations of recently (no longer) risk-listed objects
- K08J19V 2008 JV19 (arc=22 days, H=20.6 ~257m) from ARO (May 30.17-19p3)
- Observations of small asteroids (H>22.0)
- K08J26S 2008 JS26 (arc=16 days, H=23.7 ~62m) from Vaduvescu/CTIO (May 30.25-27p10) and Desert Moon Obs. (May 30.36-37p3)
- K08J02U 2008 JU2 (arc=27 days, H=22.8 ~93m) from Vaduvescu/CTIO (May 30.27-28p12)
- K08H02E 2008 HE2 (arc=33 days, H=23.6 ~65m) from Mt. John Obs. (May 30.60-61p5)
- K08GB0C 2008 GC110 (arc=46 days, H=22.2 ~123m) from ARO (May 30.10-12p3)
- K08GB0A 2008 GA110 (Q=4.497 AU, arc=46 days, H=22.1 ~129m) from the Spacewatch 0.9m telescope (May 30.29-32p3)
- K08G21X 2008 GX21 (arc=47 days, H=22.7 ~98m) from Mt. John Obs. (May 30.35-37p5)
- K08G02G 2008 GG2 (arc=55 days, H=22.8 ~93m) from ARO (May 30.17-20p3 at V=22.1-2)
- Observations of other objects
- K08K05Y 2008 KY5 (q=1.940 AU, arc=1 day, H=16.7 ~1.55 km) from MLS (May 29.22-23p4 discovery & May 30.18-24p8), Spacewatch 1.8m (May 30.15-16p3), and Bedient/Faulkes North (May 30.28-29p3)
- K08K02W 2008 KW2 (i=37.4°, arc=2 days, H=19.7 ~389m) from Jim Young via Table Mtn. Obs. (May 30.33-34p4)
- K08K00Q 2008 KQ (arc=3 days, H=20.6 ~257m) from ARO (May 30.30-32p3) and Mt. John Obs. (May 30.56-57p2)
- K08K00P 2008 KP (i=61.3°, q=0.232 AU, arc=3 days, H=18.8 ~589m) from Mt. John Obs. (May 30.38-39p3)
- K08J30Y 2008 JY30 (Q=4.171 AU, arc=16 days, H=18.6 ~645m) from Vaduvescu/CTIO (May 30.39-40p9)
- K08J26R 2008 JR26 (arc=17 days, H=20.0 ~339m) from Desert Moon Obs. (May 30.33-34p3)
- K08J20O 2008 JO20 (Q=5.270 AU, arc=22 days, H=17.2 ~1.23 km) from Desert Moon Obs. (May 30.14-18p3)
- K08J14Q 2008 JQ14 (arc=25 days, H=19.2 ~490m) from Desert Moon Obs. (May 30.27-29p3)
- K08J14P 2008 JP14 (arc=29 days, H=19.4 ~446m) from Petit Jean Mtn. South Obs. (PJMSO) (May 30.17-18p5)
- K08J08A 2008 JA8 (arc=25 days, H=18.0 ~851m) from Vaduvescu/CTIO (May 30.36-37p11)
- K08J02W 2008 JW2 (arc=27 days, H=19.6 ~407m) from Vaduvescu/CTIO (May 30.31-33p10)
- K08J00O 2008 JO (arc=28 days, H=18.3 ~741m) from Desert Moon Obs. (May 30.22p1)
- K08J00J 2008 JJ (i=44.6°, arc=31 days, H=19.2 ~490m) from Iluro Obs. (May 30.93-94p3)
- K08H04V 2008 HV4 (arc=30 days, H=19.4 ~446m) from Spacewatch 0.9m (May 30.16-20p3)
- K08H03S 2008 HS3 (arc=30 days, H=21.6 ~162m) from Gualba Obs. (May 27.91p2) and PJMSO (May 30.13-15p5)
- K08G20V 2008 GV20 (arc=49 days, H=18.6 ~645m) from ARO (May 30.13-14p3)
- K08F06N 2008 FN6 (arc=62 days, H=21.3 ~186m) from Vaduvescu/CTIO (May 30.99-04p10)
- K08F05W 2008 FW5 (arc=63 days, H=21.6 ~162m) from ARO (May 30.24-25p2 at V=22.3-4)
- K08E97Z 2008 EZ97 (arc=76 days, H=18.0 ~851m) from Vaduvescu/CTIO (May 30.37-38p11)
- K08D05G 2008 DG5 (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (May 31.15-16p3 at V=21.7-22.3)
- K08D00Y 2008 DY (Q=4.342 AU, arc=94 days, H=20.9 ~224m) from Vaduvescu/CTIO (May 30.22-25p10)
- K08D00E 2008 DE (arc=108 days, H=19.6 ~407m) from Vaduvescu/CTIO (May 30.40-41p10)
- K08C23P 2008 CP23 (arc=120 days, H=19.6 ~407m) from ARO (May 30.15-16p3) and Vaduvescu/CTIO (May 31.06-07p4)
- K07Y02B 2007 YB2 (Q=5.219 AU, arc=164 days, H=18.4 ~708m) from Vaduvescu/CTIO (May 30.33-35p8)
- K07X16H 2007 XH16 (arc=174 days, H=19.7 ~389m) from Vaduvescu/CTIO (May 30.29-30p10)
- K07W55E 2007 WE55 (arc=2 opp, H=20.1 ~323m) from Mt. John Obs. (May 30.63-66p4)
- K07W04V 2007 WV4 (i=38.3°, arc=2 opp, H=19.3 ~467m) from Desert Moon Obs. (May 30.40-43p3) and Vaduvescu/CTIO (May 30.41-42p3)
- K07V04Q 2007 VQ4 (arc=3 opp, H=16.1 ~2.04 km, q=1.271 AU) from PJMSO (May 21.23-25p5)
- K07L00L 2007 LL (arc=2 opp, H=20.4 ~282m) from Alter Satzberg Obs. (May 31.01-03p3)
- K06K00A 2006 KA (arc=2 opp, H=19.3 ~467m) from Mt. John Obs. (May 30.30-33p6)
- K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from Iluro Obs. (May 30.98-99p3)
- K04X14O 2004 XO14 (Q=4.154 AU, arc=4 opp, H=16.1 ~2.04 km, q=1.190 AU) from ARO (May 30.35p1)
- K04T18B 2004 TB18 (arc=2 opp, H=17.7 ~977m) from Spacewatch 1.8m (May 30.46p2)
- K04N08L 2004 NL8 (Q=4.419 AU, arc=3 opp, H=17.1 ~1.29 km) from Spacewatch 1.8m (May 30.43-45p3)
- J97N06J 1997 NJ6 (arc=4 opp, H=19.1 ~513m) from Bedient/Faulkes North (May 30.34-35p3)
- I4266 184266 2004 VW14 from Spacewatch 0.9m (May 30.18-22p3)
- G3335 163335 2002 LJ from MLS (May 30.33-35p4)
- F3953 153953 2002 AD9 from Bedient/Faulkes North (May 30.30-31p3)
- F3591 153591 2001 SN263 from the Siding Spring Survey (SSS) (May 30.56-60p4)
- F2679 152679 1998 KU2 from MLS (May 30.22-24p4)
- E3637 143637 2003 LP6 from MLS (May 30.18p4)
- D7170 137170 1999 HF1 from Iluro Obs. (May 30.95p3)
- 85628 85628 1998 KV2 from Spacewatch 0.9m (May 30.35-39p3)
- 39572 39572 1993 DQ1 from SSS (May 30.49-52p4)
- 35107 35107 1991 VH from Ametlla del Valles Obs. (May 30.06p5)
Observers on 31 May '08
Nineteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| B03 | Alter Satzberg Obs. in Austria, 2 in MPEC 2008-K65 -- 2008 KO, 2007 LL |
| B37 | Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-K65 -- 35107 |
| H55 | Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2008-K65 -- 2008 KZ5, 2008 KX2, 2008 KQ, 2008 KO, 2008 JV19, 2008 GV20, 2008 GG2, 2008 GC110, 2008 FW5, 2008 CP23, 2004 XO14 |
| 807, | Ovidiu Vaduvescu via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPECs 2008-K65 & 2008-K66 -- 2008 KN11, 2008 JY30, 2008 JW2, 2008 JU2, 2008 JS26, 2008 JA8, 2008 FN6, 2008 EZ97, 2008 DY, 2008 DE, 2008 CP23, 2007 YB2, 2007 XH16, 2007 WV4 |
| 448 | Desert Moon Obs. in New Mexico, 6 in MPEC 2008-K65 -- 2008 JS26, 2008 JR26, 2008 JQ14, 2008 JO20, 2008 JO, 2007 WV4 |
| F654 | Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 4 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 1997 NJ6, 153953 |
| 651 | Grasslands Obs. in Arizona, 1 in MPEC 2008-K66 -- 2008 KN11 |
| J95 | Great Shefford Obs. in England, 3 in MPEC 2008-K65 -- 2008 KZ5, 2008 KT, 2008 KO |
| 442 | Gualba Obs. in Spain, 1 in MPEC 2008-K65 -- 2008 HS3 |
| B19 | Iluro Obs. in Spain, 3 in MPEC 2008-K65 -- 2008 JJ, 2005 NB7, 137170 |
| 701 | Junk Bond Obs. in Arizona, 1 in MPEC 2008-K65 -- 2008 KZ5 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-K65 -- 2008 AF4 |
| 474 | Mt. John Obs. in New Zealand, 8 in MPECs 2008-K65 & 2008-K66 -- 2008 KZ5, 2008 KQ, 2008 KP, 2008 KN11, 2008 HE2, 2008 GX21, 2007 WE55, 2006 KA |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 163335, 152679, 143637 |
| H45 | Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-K65 -- 2008 JP14, 2008 HS3, 2007 VQ4 |
| E12 | Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-K65 -- 39572, 153591 |
| 691 | Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-K65 -- 2008 HV4, 2008 GA110, 85628, 184266 |
| 291 | Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 2008 HU4, 2008 DG5, 2004 TB18, 2004 NL8 |
| 6735 | Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-K65 -- 2008 KW2 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 31 May '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 KN11 | JPL Sentry | 1628 | 2031-2073 | 33 | 1.2e-05 | -3.81 | -4.57 | 0 | JPL: "Analysis based on 33 observations spanning 1.0546 days (2008-May-30.33435 to 2008-May-31.38895)." Diameter approximately 0.084 km. from mean, weighted H=23.0. |
| 2008 KF6 | NEODyS | 1142 | 2035-2081 | 8 | 1.32e-08 | -7.12 | -7.26 | 0 | NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/05/30.620 to 2008/05/30.711." |
| 2008 KD6 | NEODyS | 1142 | 2010-2082 | 53 | 1.69e-09 | -5.12 | -5.69 | 0 | NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/05/29.430 to 2008/05/30.421." |
| 2008 KZ5 | NEODyS | 1142 | 2013-2089 | 35 | 2.62e-06 | -2.93 | -3.48 | 0 | NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2008/05/29.229 to 2008/05/31.016." |
| JPL Sentry | 1140 | 2013-2107 | 290 | 7.4e-06 | -2.40 | -2.77 | 0 | JPL: "Analysis based on 39 observations spanning 1.7873 days (2008-May-29.22802 to 2008-May-31.01534)." Diameter approximately 0.350 km. from mean, weighted H=19.9. | |
| 2008 KX2 | NEODyS | 1141 | R E M O V E D | - | |||||
| JPL Sentry | 1140 | R E M O V E D | JPL: Risk listing removed at 0850 UTC. | ||||||
| 2008 KT | JPL Sentry | 1140 | 2100-2105 | 3 | 4.6e-07 | -8.40 | -8.59 | 0 | JPL: "Analysis based on 23 observations spanning 2.6661 days (2008-May-28.25417 to 2008-May-30.92022)." Diameter approximately 0.008 km. from mean, weighted H=28.2. |
| NEODyS | 1141 | R E M O V E D | - | ||||||
| 2008 KO | NEODyS | 1142 | 2049-2061 | 3 | 1.06e-06 | -5.31 | -5.64 | 0 | NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2008/05/27.377 to 2008/05/30.986." |
| JPL Sentry | 1140 | 2049-2052 | 2 | 9.4e-07 | -5.35 | -5.63 | 0 | JPL: "Analysis based on 38 observations spanning 3.6090 days (2008-May-27.3758 to 2008-May-30.984819)." Diameter approximately 0.044 km. from mean, weighted H=24.4. | |
| 2008 HU4 | NEODyS | 1302 | 2076-2088 | 7 | 4.47e-06 | -7.37 | -7.59 | 0 | NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2008/04/30.325 to 2008/05/30.342." |
| JPL Sentry | 1140 | 2059-2078 | 4 | 4.4e-06 | -7.36 | -7.56 | 0 | JPL: "Analysis based on 58 observations spanning 30.016 days (2008-Apr-30.32444 to 2008-May-30.34085)." Diameter approximately 0.007 km. from mean, weighted H=28.4. | |
| 2008 AF4 | JPL Sentry | 1140 | 2089-2100 | 4 | 1.6e-06 | -3.49 | -3.76 | 0 | JPL: "Analysis based on 602 observations spanning 130.92 days (2008-Jan-10.39652 to 2008-May-20.315005)." Diameter approximately 0.390 km. from mean, weighted H=19.7. |
| NEODyS | 1141 | R E M O V E D | - | ||||||
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 31 May '08
Times are UTC for when items were noted or added by The Tracking News.
| 1628 | Noted that JPL Sentry has posted 2008 KN11 as an impact risk - see above |
| 1302 | Noted that NEODyS has updated its 2008 HU4 risk assessment - see above |
| 1300 | Grabbed MPEC 2008-K66 - 2008 KN11 - see above |
| 1142 | Noted that NEODyS has updated its 2008 KO risk assessment - see above |
| 1141 | Noted that NEODyS has removed 2008 AF4 as an impact risk - see above Noted that NEODyS has posted 2008 KD6 as an impact risk - see above Noted that NEODyS has posted 2008 KF6 as an impact risk - see above Noted that NEODyS has removed 2008 KT as an impact risk - see above Noted that NEODyS has removed 2008 KX2 as an impact risk - see above Noted that NEODyS has posted 2008 KZ5 as an impact risk - see above Grabbed MPEC 2008-K65 - Daily Orbit Update - see above |
| 1140 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 HU4 risk assessment - see above Noted that JPL Sentry has updated its 2008 KO risk assessment - see above Noted that JPL Sentry has updated its 2008 KT risk assessment - see above Noted that JPL Sentry has removed 2008 KX2 as an impact risk - see above Noted that JPL Sentry has updated its 2008 KZ5 risk assessment - see above |
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