Contents on 24 April '08
- IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- three MPECs
- Observers -- fourteen 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
NOTE: The Tracking News and this Web site will be updating less often, and at sometimes irregular intervals, for the rest of April.
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 24 April '08
The MPC's NEO Confirmation Page is currently empty
The NEOCP is currently empty. There were two listings noted earlier today.
New MPECs on 24 April '08
Minor Planet Electronic Circulars
As of last check at 2357 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2008-H22 time-stamped "06:06 UT" - Daily Orbit Update - see below
- MPEC 2008-H23 time-stamped "14:35 UT" - 2008 HG - see below
- MPEC 2008-H24 time-stamped "16:00 UT" - 2008 HH
MPEC 2008-H24 - "16:00 UT" - 2008 HH
- K08H00H 2008 HH (risk-listed, H=21.9 ~141m) was discovered at 0723 UT on 24 April by the Mt. Lemmon Survey (MLS), which observed it at April 24.31-35p8 and 24.43p4. The discovery was confirmed by the FTP education program via Faulkes Telescope North (April 24.57-58p2).
MPEC 2008-H23 - "14:35 UT" - 2008 HG
- K08H00G 2008 HG (risk-listed, H=23.7 ~62m) was discovered at 0638 UT on 24 April by the Spacewatch 1.8m telescope, which observed it at April 24.28p3 and 24.33-34p3. The discovery was confirmed by Sabino Canyon Obs. (April 24.31-32p3), MLS (April 24.35-36p4), and FTP educ. prog. (April 24.57-58p2).
<< DOU on 24 Apr. '08 >> MPEC 2008-H22 - "06:06 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K08H00E 2008 HE (q=0.112 AU, Q=4.896 AU, arc=6 days, H=17.9 ~891m) from Astronomical Research Obs. (ARO) (April 22.16-17p3), Great Shefford Obs. (April 23.88-89p3), and Alter Satzberg Obs. (April 23.89-92p2)
- K08A04F 2008 AF4 (arc=104 days, H=19.7 ~389m) from David Tholen's team on Mauna Kea (April 12.24p1) and ARO (April 23.09-11p3 at V=22.2-3)
- Observations of recently (no longer) risk-listed objects
- K08GB0D 2008 GD110 (small asteroid, arc=10 days, H=24.5 ~43m) from Alter Satzberg Obs. (April 23.81-86p5) and Great Shefford Obs. (April 23.85-90p8)
- K08G01D 2008 GD1 (small asteroid, arc=21 days, H=22.4 ~112m) from ARO (April 23.18-19p3) and Spacewatch 1.8m (April 24.19-20p3)
- Observations of small asteroids (H>22.0)
- K08GB0C 2008 GC110 (arc=10 days, H=22.4 ~112m) from Tiki Obs. (April 23.46-48p2) and Great Shefford Obs. (April 24.07-08p3)
- K08G02K 2008 GK2 (arc=17 days, H=22.9 ~89m) from ARO (April 23.09-11p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K08GB0E 2008 GE110 (arc=10 days, H=22.0 ~135m) from Spacewatch 1.8m (April 24.22-23p3)
- Observations of other objects
- K08GB0F 2008 GF110 (arc=10 days, H=18.7 ~616m) from Great Shefford Obs. (April 23.99-01p3)
- K08GB0B 2008 GB110 (i=36.3°, arc=8 days, H=19.7 ~389m) from ARO (April 22.24p3)
- K08G03Y 2008 GY3 (arc=16 days, H=20.7 ~245m) from Spacewatch 1.8m (April 24.17p3)
- K08G03V 2008 GV3 (i=72.9°, arc=17 days, H=18.6 ~645m) from Atlante Obs. (April 23.94-95p3)
- K08F06Y 2008 FY6 (arc=25 days, H=20.3 ~295m) from ARO (April 23.16-17p3) and Spacewatch 1.8m (April 24.18-19p3)
- K08F06U 2008 FU6 (arc=2 opp, H=17.9 ~891m) from Atlante Obs. (April 24.12-14p2)
- K08F06N 2008 FN6 (arc=25 days, H=21.3 ~186m) from Tiki Obs. (April 23.51-55p3)
- K08F00G 2008 FG (i=39.3°, arc=28 days, H=19.8 ~371m) from Spacewatch 1.8m (April 24.14-15p3)
- K08E09M 2008 EM9 (q=0.291 AU, arc=43 days, H=17.4 ~1.12 km) from ARO (April 22.18-19p3)
- K08E05V 2008 EV5 (arc=50 days, H=20.0 ~339m) from ARO (April 23.07-08p3)
- K08E01J 2008 EJ1 (i=38.8°, arc=52 days, H=15.8 ~2.34 km, q=0.981 AU) from Tiki Obs. (April 23.30p1 & 23.35-38p2)
- K08D00E 2008 DE (arc=72 days, H=19.5 ~426m) from Atlante Obs. (April 24.06-07p3)
- K05UF6P 2005 UP156 (arc=4 opp, H=16.9 ~1.41 km) from Tiki Obs. (April 23.61-64p3)
- K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from Atlante Obs. (April 22.91-92p3) and Iluro Obs. (April 22.98-99p3)
- K04F32N 2004 FN32 (arc=4 opp, H=18.9 ~562m) from Cima Rest Obs. (April 20.03p2)
- K04C02R 2004 CR2 (arc=2 opp, H=19.3 ~467m) from Gelenau Obs. (April 23.87-88p3)
- K02J00C 2002 JC (i=40.9°, arc=6 opp, H=17.2 ~1.23 km) from Inastars Obs. (April 23.92-93p6)
- F4988 154988 2004 XN35 from Inastars Obs. (April 23.84p3) and Atlante Obs. (April 23.91-92p3)
- 40267 40267 1999 GJ4 from Inastars Obs. (April 23.87-89p4)
- 03752 3752 Camillo (1985 PA) from Atlante Obs. (April 24.01-04p3)
Observers on 24 April '08
Fourteen observing facilities appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| B03 | Alter Satzberg Obs. in Austria, 2 in MPEC 2008-H22 -- 2008 HE, 2008 GD110 |
| H55 | Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2008-H22 -- 2008 HE, 2008 GK2, 2008 GD1, 2008 GB110, 2008 FY6, 2008 EV5, 2008 EM9, 2008 AF4 |
| J51 | Atlante Obs. in the Canary Islands, 6 in MPEC 2008-H22 -- 2008 GV3, 2008 FU6, 2008 DE, 2005 NB7, 154988, 3752 |
| B11 | Cima Rest Obs. in Italy, 1 in MPEC 2008-H22 -- 2004 FN32 |
| F653 | FTP education program via Faulkes Telescope North in Hawaii, 2 in MPECs 2008-H23 & 2008-H24 -- 2008 HH, 2008 HG |
| B32 | Gelenau Obs. in Germany, 1 in MPEC 2008-H22 -- 2004 CR2 |
| J95 | Great Shefford Obs. in England, 4 in MPEC 2008-H22 -- 2008 HE, 2008 GF110, 2008 GD110, 2008 GC110 |
| B19 | Iluro Obs. in Spain, 1 in MPEC 2008-H22 -- 2005 NB7 |
| B15 | Inastars Obs. in Germany, 3 in MPEC 2008-H22 -- 2002 JC, 40267, 154988 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-H22 -- 2008 AF4 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-H23 & 2008-H24 -- 2008 HH, 2008 HG |
| 854 | Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-H23 -- 2008 HG |
| 291 | Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2008-H22 & 2008-H23 -- 2008 HG, 2008 GY3, 2008 GE110, 2008 GD1, 2008 FY6, 2008 FG |
| F85 | Tiki Obs. in Tahiti, 4 in MPEC 2008-H22 -- 2008 GC110, 2008 FN6, 2008 EJ1, 2005 UP156 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 24 April '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 HH | JPL Sentry | 2119 | 2021-2104 | 18 | 7.3e-09 | -6.34 | -6.61 | 0 | JPL: "Analysis based on 14 observations spanning .27192 days (2008-Apr-24.30829 to 2008-Apr-24.58021)." Diameter approximately 0.148 km. from mean, weighted H=21.8. |
| 2008 HG | JPL Sentry | 2119 | 2035-2097 | 7 | 7.2e-09 | -7.34 | -7.50 | 0 | JPL: "Analysis based on 15 observations spanning .29900 days (2008-Apr-24.27646 to 2008-Apr-24.57546)." Diameter approximately 0.066 km. from mean, weighted H=23.5. |
| 2008 HE | NEODyS | 1731 | 2071 | 1 | 2.45e-11 | -6.66 | -6.66 | 0 | NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2008/04/18.139 to 2008/04/23.920." |
| JPL Sentry | 1048 | R E M O V E D | JPL: Risk listing removed at 0920 UTC. | ||||||
| 2008 AF4 | NEODyS | 1731 | 2089 | 1 | 7.85e-09 | -5.76 | -5.76 | 0 | NEODyS: "Based on 604 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/04/23.114." |
| JPL Sentry | 1048 | 2089-2100 | 6 | 5.7e-06 | -2.95 | -3.07 | 0 | JPL: "Analysis based on 600 observations spanning 103.72 days (2008-Jan-10.39652 to 2008-Apr-23.113051)." Diameter approximately 0.390 km. from mean, weighted H=19.7. | |
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 24 April '08
Times are UTC for when items were noted or added by The Tracking News.
| 2119 | Noted that JPL Sentry has posted 2008 HG as an impact risk - see above Noted that JPL Sentry has posted 2008 HH as an impact risk - see above |
| 1731 | Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 HE risk assessment - see above Grabbed MPEC 2008-H23 - 2008 HG - see above Grabbed MPEC 2008-H24 - 2008 HH - see above The NEOCP has become empty |
| 1049 | Grabbed MPEC 2008-H22 - Daily Orbit Update - see above |
| 1048 | Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has removed 2008 HE as an impact risk - see above The NEOCP has become active |
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2008 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).