Contents on 9 January '18
- Traffic Report -- no objects
- IAU Minor Planet Center
- Observers -- sixteen observers
- Impact Risk Monitoring -- four objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 906 risk-listed objects, 54 have had news in the last 31 days. Updated at 2012 UTC on 9 Jan.
- Ephemerides for risk-listed objects & close passers
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (old)
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. To keep track of what's new each day, watch the Chronology section.
Traffic Report on 9 January '18
No objects reported inside ten LD
No asteroids have yet been confirmed to be moving within ten lunar distances (LD) of Earth today. Next known to be coming our way is 2018 AJ, which arrives inside ten LD on or about January 16th.
This report was generated at 1812 UTC with follow-up in today's DOU MPEC for departed intruder 2018 AH and distant 208023 1999 AQ10.
Reading: A news release today tells that a meteorite "pebble" named Hypatia is "completely different from ... known types of meteorites" and appears to have formed before the Solar System and maybe outside the nebula from which the Sun and Earth were born. Clues include inclusions of pure aluminum crystals and lack of silicate minerals (abstract)."
Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 9 January '18
The MPC's NEO Confirmation Page has 32 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 53 listings on the NEOCP today.
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.
New MPECs on 9 January '18
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-A30 time-stamped "13:03 UT" - Daily Orbit Update - see below
- MPEC 2018-A31 time-stamped "17:31 UT" - 2018 AT - see below
- MPEC 2018-A32 time-stamped "17:34 UT" - 2018 AU - see below
- MPEC 2018-A33 time-stamped "17:38 UT" - 2018 AV - see below
- MPEC 2018-A34 time-stamped "17:42 UT" - 2018 AW - see below
- MPEC 2018-A35 time-stamped "17:46 UT" - 2018 AY - see below
- MPEC 2018-A36 time-stamped "17:50 UT" - 2018 AZ - see below
- MPEC 2018-A37 time-stamped "18:32 UT" - 2018 AX
MPEC 2018-A37 - "18:32 UT" - 2018 AX
- K18A00X 2018 AX (H=20.9 ~224m) was picked up at 0940 UT on 5 Jan. by Pan-STARRS 1 (PS1), observing it at Jan. 5.40-44p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Jan. 6.11p4 & 8.14p4), Magdalena Ridge Obs. (MRO) (Jan. 6.22-24p4), Sandlot Obs. (Jan. 6.28-30p3 & 8.11-13p3), Great Shefford Obs. (Jan. 6.87-88p3 & 7.81-82p3), Astronomical Research Obs. Westfield (Jan. 7.16p3), the Spacewatch 1.8m telescope (Jan. 8.22p3), and GINOP-KHK (Jan. 8.85p2).
MPEC 2018-A36 - "17:50 UT" - 2018 AZ
- K18A00Z 2018 AZ (H=21.1 ~204m) was picked up at 1153 UT on 8 Jan. by PS1, observing it at Dec. 29.37-40p3, Jan. 2.47-49p2, 6.41-44p3, and 8.50-53p3. This detection was confirmed by GINOP-KHK (Jan. 8.87-88p3).
MPEC 2018-A35 - "17:46 UT" - 2018 AY
- K18A00Y 2018 AY (risk listed, Q=4.191 AU, Earth MOID=7.2 LD, H=23.0 ~85m) was picked up at 0534 UT on 7 Jan. by the Mt. Lemmon Survey (MLS), observing it at Jan. 7.23-25p4 and 7.31-33p8. This detection was confirmed by Great Shefford Obs. (Jan. 7.78-80p3), GINOP-KHK (Jan. 7.80p3 & 8.99-00p3), Steward Mt. Lemmon Sta. (Jan. 8.14-15p4 & 9.34p2), Sandlot Obs. (Jan. 8.15p1 & 8.24-25p2), Inastars Obs. (Jan. 8.81-82p4), and ROASTERR-1 (Jan. 8.85-87p3).
MPEC 2018-A34 - "17:42 UT" - 2018 AW
- K18A00W 2018 AW (q=0.289 AU, Q=4.824 AU, H=19.5 ~426m) was picked up at 0617 UT on 5 Jan. by MLS, observing it at Jan. 5.26-28p4. This detection was confirmed by PS1 (Nov. 13.60-63p3 at w=23.6-8 & Dec. 11.47p1 at i=21.6), Steward Mt. Lemmon Sta. (Jan. 5.32p3 & 8.17p4), MRO (Jan. 6.21-23p4), Sandlot Obs. (Jan. 6.36-38p4 & 8.27-30p3), Great Shefford Obs. (Jan. 6.91-92p3 & 7.89-90p3), ARO Westfield (Jan. 7.17-18p3), and GINOP-KHK (Jan. 8.86p3).
MPEC 2018-A33 - "17:38 UT" - 2018 AV
- K18A00V 2018 AV (small asteroid, H=23.3 ~74m) was picked up at 0602 UT on 5 Jan. by PS1, observing it at Jan. 5.25-29p4 at w=21.7-22.3. This detection was confirmed by MRO (Jan. 6.09-11p4) and ARO Westfield (Jan. 7.11-14p3 at V=21.8-22.1).
MPEC 2018-A32 - "17:34 UT" - 2018 AU
- K18A00U 2018 AU (small asteroid, H=22.7 ~98m) was picked up at 0552 UT on 5 Jan. by PS1, observing it at Jan. 5.24-28p4. This detection was confirmed by MRO (Jan. 6.12-14p4), ARO Westfield (Jan. 7.07-09p3), and Steward Mt. Lemmon Sta. (Jan. 8.13-14p4 at G=21.6-22.1).
MPEC 2018-A31 - "17:31 UT" - 2018 AT
- K18A00T 2018 AT (risk listed, H=20.5 ~269m) was picked up at 0225 UT on 5 Jan. by MLS, observing it at Jan. 5.10-12p4 at G=20.3-21.0, 5.23-24p3 at G=21.8-22.2, and 8.25p4 at G=21.2-9. This detection was confirmed by Spacewatch via Kitt Peak Natl. Obs. (KPNO) (Jan. 5.25-26p3), MRO (Jan. 6.07-09p4), Steward Mt. Lemmon Sta. (Jan. 6.11-12p3), and ARO Westfield (Jan. 7.04-05p3).
- Observations of risk-listed objects
- K17Y01Z 2017 YZ1 (arc=20 days, H=20.6 ~257m) from Steward Mt. Lemmon Sta. (Jan. 9.45-46p2)
- Observations of close-passing objects
- K18A00H 2018 AH (Q=4.203 AU, arc=6 days, H=22.6 ~102m) from the Catalina Sky Survey (CSS) (Jan. 9.43-44p3)
- K8023 208023 1999 AQ10 from ATLAS Mauna Loa (Jan. 8.60-64p4)
- Observation campaigns (NHATS targets, radar support)
- K16A08U 2016 AU8 (arc=3 opp, H=19.9 ~355m, NHATS) from ATLAS Mauna Loa (Jan. 8.43-48p4)
-- NHATS target table & ephemerides
- Observations of small asteroids (H>22.0)
- K17S02L 2017 SL2 (arc=116 days, H=22.9 ~89m) from PS1 (Jan. 8.37-40p3)
- Observations of other objects
- K17Y04P 2017 YP4 (Q=4.432 AU, arc=17 days, H=19.0 ~537m) from MLS (Jan. 9.18-20p4)
- K17S17O 2017 SO17 (Q=4.199 AU, arc=105 days, H=18.8 ~589m) from PS1 (Jan. 8.49-53p4)
- K17P30S 2017 PS30 (arc=147 days, H=19.4 ~446m) from PS1 (Jan. 8.32-34p3)
- K15Y01R 2015 YR1 (i=50.5°, arc=2 opp, H=19.1 ~513m) from ATLAS Mauna Loa (Jan. 8.61-65p4)
- K09W07Z 2009 WZ7 (arc=2 opp, H=19.7 ~389m) from PS1 (Jan. 8.33-35p3)
- K07A02T 2007 AT2 (arc=4 opp, H=19.6 ~407m) from MLS (Jan. 9.09-11p4) and CSS (Jan. 9.13-14p3)
- K04B00B 2004 BB (arc=3 opp, H=19.5 ~426m) from the Spacewatch 0.9m telescope (Jan. 9.37-40p3)
- J99A04F 1999 AF4 (Q=4.570 AU, arc=2 opp, H=18.5 ~676m) from Northolt Branch Obs. (Jan. 7.85-86p10), ATLAS Mauna Loa (Jan. 8.58-62p4), and MLS (Jan. 9.36-37p4)
- o4928 504928 2011 CO2 from ATLAS Mauna Loa (Jan. 8.58-60p3), ROASTERR-1 (Jan. 8.92-94p6), and MLS (Jan. 9.33-35p4)
- j9386 459386 2012 KJ11 from PS1 (Jan. 8.62-64p3)
- i4193 444193 2005 SE71 from ATLAS Mauna Loa (Jan. 8.22-25p4)
- h8430 438430 2006 WL3 from ATLAS Mauna Loa (Jan. 8.36-39p4)
- b4851 374851 2006 VV2 from ATLAS Mauna Loa (Jan. 8.26-29p4)
- Y8314 348314 2005 BC from ATLAS Mauna Loa (Jan. 8.25-28p4) and CSS (Jan. 9.08-09p4)
- W6354 326354 2000 SJ344 from PS1 (Jan. 6.58-62p3), Great Shefford Obs. (Jan. 7.94-96p2), and Sandlot Obs. (Jan. 8.32-33p3)
- U2311 302311 2002 AA from ATLAS Mauna Loa (Jan. 8.60-64p4)
- O4977 244977 2004 BE68 from PS1 (Jan. 8.26-30p3)
- O2216 242216 2003 RN10 from MLS (Jan. 9.10-11p4)
- N8063 238063 2003 EG from PS1 (Jan. 8.62-64p3)
- M8587 228587 2002 AP7 from ATLAS Mauna Loa (Jan. 8.56-60p4)
- K2435 202435 2005 XH8 from MLS (Jan. 9.12-13p4)
- G3696 163696 2003 EB50 from ATLAS Mauna Loa (Jan. 8.41-44p3)
- F4347 154347 2002 XK4 from Northolt Branch Obs. (Jan. 7.87-88p6) and ATLAS Mauna Loa (Jan. 8.49-54p4)
- D7924 137924 2000 BD19 from PS1 (Jan. 8.49-53p4)
- D7062 137062 1998 WM from ATLAS Mauna Loa (Jan. 8.38-40p3)
- B1253 111253 2001 XU10 from ATLAS Mauna Loa (Jan. 8.53-57p4)
- 88188 88188 2000 XH44 from ATLAS Mauna Loa (Jan. 8.38-41p4)
- 85839 85839 1998 YO4 from PS1 (Jan. 8.31-35p4)
- 22771 22771 1999 CU3 from MLS (Jan. 9.08-09p4)
- 21374 21374 1997 WS22 from ATLAS Mauna Loa (Jan. 8.33-39p5)
- 17511 17511 1992 QN from ATLAS Mauna Loa (Jan. 8.32-35p4) and CSS (Jan. 9.11p1)
- 12711 12711 Tukmit (1991 BB) from ATLAS Mauna Loa (Jan. 8.45-50p8)
- 11066 11066 Sigurd (1992 CC1) from ATLAS Mauna Loa (Jan. 8.21-25p3)
- 06053 6053 1993 BW3 from Northolt Branch Obs. (Jan. 7.91-93p10), ATLAS Mauna Loa (Jan. 8.64-67p3), and CSS (Jan. 9.40-42p4)
- 03122 3122 Florence (1981 ET3) from ATLAS Mauna Loa (Jan. 8.45-48p4)
- 01864 1864 Daedalus (1971 FA) from CSS (Jan. 9.45-48p4)
Observers on 9 January '18
Sixteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2018-A31, 2018-A32, 2018-A33, 2018-A34 & 2018-A37 -- 2018 AX, 2018 AW, 2018 AV, 2018 AU, 2018 AT|
|T08||ATLAS Mauna Loa in Hawaii, 22 in MPEC 2018-A30 -- 2016 AU8, 2015 YR1, 1999 AF4, 88188, 504928, 444193, 438430, 374851, 348314, 302311, 228587, 21374, 208023, 17511, 163696, 154347, 137062, 12711, 111253, 11066, 6053, 3122|
|703||Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2018-A30 -- 2018 AH, 2007 AT2, 348314, 17511, 6053, 1864|
|K88||GINOP-KHK in Hungary, 4 in MPECs 2018-A34, 2018-A35, 2018-A36 & 2018-A37 -- 2018 AZ, 2018 AY, 2018 AX, 2018 AW|
|J95||Great Shefford Obs. in England, 4 in MPECs 2018-A30, 2018-A34, 2018-A35 & 2018-A37 -- 2018 AY, 2018 AX, 2018 AW, 326354|
|B15||Inastars Obs. in Germany, 1 in MPEC 2018-A35 -- 2018 AY|
|695^||Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2018-A31 -- 2018 AT|
|H01||Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-A31, 2018-A32, 2018-A33, 2018-A34 & 2018-A37 -- 2018 AX, 2018 AW, 2018 AV, 2018 AU, 2018 AT|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2018-A30, 2018-A31, 2018-A34 & 2018-A35 -- 2018 AY, 2018 AW, 2018 AT, 2017 YP4, 2007 AT2, 1999 AF4, 504928, 242216, 22771, 202435|
|Z80||Northolt Branch Obs. in England, 3 in MPEC 2018-A30 -- 1999 AF4, 154347, 6053|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2018-A30, 2018-A32, 2018-A33, 2018-A34, 2018-A36 & 2018-A37 -- 2018 AZ, 2018 AX, 2018 AW, 2018 AV, 2018 AU, 2017 SO17, 2017 SL2, 2017 PS30, 2009 WZ7, 85839, 459386, 326354, 244977, 238063, 137924|
|L04||ROASTERR-1 in Romania, 2 in MPECs 2018-A30 & 2018-A35 -- 2018 AY, 504928|
|H36||Sandlot Obs. in Kansas, 4 in MPECs 2018-A30, 2018-A34, 2018-A35 & 2018-A37 -- 2018 AY, 2018 AX, 2018 AW, 326354|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-A30 -- 2004 BB|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-A37 -- 2018 AX|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2018-A30, 2018-A31, 2018-A32, 2018-A34, 2018-A35 & 2018-A37 -- 2018 AY, 2018 AX, 2018 AW, 2018 AU, 2018 AT, 2017 YZ1|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 9 January '18
Notes for Today's Latest Risk Assessments
|2018 AY||JPL Sentry||2012||2099-2099||1||1.547e-08||-7.18||-7.18||0||JPL: Computed at 11:50 today Pacific time based on 37 observations spanning 2.1096 days (2018-Jan-07.23245 to 2018-Jan-09.34204). Diameter approximately 0.085 km. from weighted mean H=23.01.|
|2018 AT||JPL Sentry||1900||2028-2039||3||6.515e-10||-6.75||-6.94||0||JPL: Computed at 10:54 today Pacific time based on 24 observations spanning 3.1537 days (2018-Jan-05.10109 to 2018-Jan-08.25478). Diameter approximately 0.230 km. from weighted mean H=20.83.|
|2010 JA43||JPL Sentry||1900||2019-2117||107||8.94648000000001e-08||-4.87||-5.29||0||JPL: Computed at 22:17 April 7th of 2017 Pacific time based on 21 observations spanning 2.7122 days (2010-May-04.53905 to 2010-May-07.25122). Diameter approximately 0.161 km. from weighted mean H=21.61.|
|2010 GZ60||JPL Sentry||1900||2018-2116||475||5.3889798e-06||-0.90||-1.98||0||JPL: Computed at 13:26 April 18th of 2017 Pacific time based on 14 observations spanning 1.2571 days (2010-Apr-05.71913 to 2010-Apr-06.97621). Diameter approximately 2.000 km. from weighted mean H=16.14.|
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 9 January '18
Times are UTC for when items were noted or added by The Tracking News.
|2012||Noted that JPL Sentry has posted 2018 AY as an impact risk - see above|
|1900||Noted that JPL Sentry has updated its 2010 GZ60 risk assessment - see above|
Noted that JPL Sentry has updated its 2010 JA43 risk assessment - see above
Noted that JPL Sentry has posted 2018 AT as an impact risk - see above
|1835||Grabbed MPEC 2018-A37 - 2018 AX - see above|
|1812||Generated Traffic Report|
|1800||Grabbed MPEC 2018-A31 - 2018 AT - see above|
Grabbed MPEC 2018-A32 - 2018 AU - see above
Grabbed MPEC 2018-A33 - 2018 AV - see above
Grabbed MPEC 2018-A34 - 2018 AW - see above
Grabbed MPEC 2018-A35 - 2018 AY - see above
Grabbed MPEC 2018-A36 - 2018 AZ - see above
|1610||Grabbed MPEC 2018-A30 - Daily Orbit Update - see above|