Contents on 5 October '17
- Traffic Report -- three objects
- IAU Minor Planet Center
- Observers -- seven observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 823 risk-listed objects, 50 have had news in the last 31 days. Updated at 1609 UTC on 5 Oct.
- 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 5 October '17
Three objects reported inside ten LD
There are three minor planets known to be inside ten lunar distances (LD) of Earth today. Nearest is intruder 2017 SX17, which is outbound from 3.91 to 5.42 LD. Much further away, the much anticipated intruder 2012 TC4 comes inside ten LD, slipping in from 10.74 to 9.26 LD. It is risk listed and is a target for planetary radar and NHATS.
|Earth passage||I D||~Size||Distance Today||Notes|
|0.13 LD Oct. 12||2012 TC4||15 m||9.26 from 10.74 LD||intruder, enters ten LD, radar/NHATS target, risk|
|0.23 LD Oct. 2||2017 SX17||8 m||3.91 to 5.42 LD||intruder|
|5.38 LD Oct. 3||2017 SS16||18 m||8.40 to 11.45 LD||exits ten LD|
|Approaching (sorted by 10-LD bubble entry date)|
|8.94 LD Oct. 11||2017 SB20||36 m||< 10 LD Oct. 8|
|8.5 LD Oct. 13||2005 TE49||15 m||< 10 LD Oct. 11, uncertainty +/- 10.1167 hours, NHATS target|
|5.77 LD Oct. 22||171576 1999 VP11||645 m||< 10 LD Oct. 20|
|8.66 LD Nov. 17||444584 2006 UK||309 m||< 10 LD Nov. 16, NEW|
This report was generated at 1644 UTC with the addition of 444584 2006 UK to this reporting. It is now coming into view for many observers.
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. Object 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 5 October '17
The MPC's NEO Confirmation Page has 95 listings
When last checked at 2342 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 95 objects listed. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 103 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 5 October '17
Minor Planet Electronic Circulars
As of last check at 2342 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observation campaigns (NHATS targets, radar support)
- P0458 250458 2004 BO41 (radar) from Squirrel Valley Obs. (Oct. 5.00-03p3)
- 68950 68950 2002 QF15 (radar) from Castelmartini Obs. (Oct. 4.80p3)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K11O26E 2011 OE26 (Q=5.153 AU, arc=24 days, H=23.0 ~85m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2011 Aug. 19.48-50p4 at G=22.7-23.3)
- Observations of other objects
- K17R01V 2017 RV1 (arc=91 days, H=20.1 ~323m) from Castelmartini Obs. (Oct. 4.81-82p3)
- K17M03Y 2017 MY3 (Q=5.005 AU, arc=101 days, H=19.2 ~490m) from Castelmartini Obs. (Sept. 21.93p3)
- K17F90J 2017 FJ90 (arc=197 days, H=19.1 ~513m) from Castelmartini Obs. (Oct. 4.79-80p3)
- K15KC0N 2015 KN120 (arc=2 opp, H=20.4 ~282m) from N.V. Maigurova via Nikolaev Obs. (Oct. 2.99-01p10)
- K04T13Q 2004 TQ13 (Q=4.058 AU, arc=5 opp, H=18.3 ~741m) from Castelmartini Obs. (Sept. 21.91p3)
- n6018 496018 2008 NU from Rand II Obs. (Aug. 17.18p4, 22.11-12p4, 27.17p2, 31.11p4, Sept. 12.10-11p4, 23.06-07p3 & 25.00-01p4)
- n6005 496005 2007 XJ16 from Castelmartini Obs. (Oct. 4.79p3)
- W6388 326388 2001 QD96 from Maigurova/Nikolaev Obs. (Oct. 2.90-92p10)
- T4739 294739 2008 CM from ATLAS Mauna Loa (Oct. 4.25-27p4)
- Q5962 265962 2006 CG from Castelmartini Obs. (Sept. 21.90-91p3)
- M0909 220909 2005 EO1 from Castelmartini Obs. (Oct. 4.82-83p3)
- E2040 142040 2002 QE15 from Castelmartini Obs. (Oct. 4.78-79p3)
- 90075 90075 2002 VU94 from Castelmartini Obs. (Sept. 21.92-93p3)
- 55408 55408 2001 TC2 from Castelmartini Obs. (Sept. 21.90p3)
- 04197 4197 Morpheus (1982 TA) from Maigurova/Nikolaev Obs. (Oct. 3.11p3)
- 03753 3753 Cruithne (1986 TO) from Maigurova/Nikolaev Obs. (Oct. 3.10p2)
- 03122 3122 Florence (1981 ET3) from Spirit Marsh Obs. (Oct. 5.05-08p3)
Observers on 5 October '17
Seven observers appear in today's MPEC.
|Code||Observer / observatory|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-T16 -- 294739|
|160||Castelmartini Obs. in Italy, 11 in MPEC 2017-T16 -- 2017 RV1, 2017 MY3, 2017 FJ90, 2004 TQ13, 90075, 68950, 55408, 496005, 265962, 220909, 142040|
|0895||N.V. Maigurova via Nikolaev Obs. in Ukraine, 4 in MPEC 2017-T16 -- 2015 KN120, 326388, 4197, 3753|
|W71||Rand II Obs. in New York, 1 in MPEC 2017-T16 -- 496018|
|V78||Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-T16 -- 3122|
|W34||Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-T16 -- 250458|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-T16 -- 2011 OE26|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 5 October '17
Notes for Today's Latest Risk Assessments
|2017 OO1||NEODyS||1450||R E M O V E D||-|
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.