Contents  on 5 November '18

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

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 November '18

Eleven objects reported inside ten LD

Eleven small celestial objects are reported within ten lunar distances (LD) of Earth today. Nearest are 2018 VG, which heads outward from 3.57 to 5.20 LD, 2018 UD3, moving out from 4.04 to 5.57 LD, and risk-listed intruder 2018 VP1, slipping away from 4.84 to 6.98 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.39 LD Nov. 2 2018 VP1 2 m  4.84 to 6.98 LD Oct. 29 - Nov. 7 intruder, risk
1.19 LD Nov. 3 2018 VG 13 m  3.57 to 5.20 LD Oct. 28 - Nov. 8 NHATS target - DOU
1.44 LD Oct. 28 2018 VC 18 m  8.26 to 9.40 LD Oct. 20 - tomorrow NHATS target, risk - DOU
1.47 LD Oct. 31 2018 VL 10 m  8.47 to 10.23 LD Oct. 25 - today NHATS target, exits ten LD - DOU
1.62 LD Nov. 2 2018 UD3 20 m  4.04 to 5.57 LD Oct. 27 - Nov. 8
3.92 LD Dec. 2 2018 TG6 11 m  8.18 from 8.43 LD Oct. 30 - Jan. 5 NHATS target - DOU
5.70 LD Nov. 2 2018 VB 22 m  7.86 to 9.34 LD Oct. 29 - tomorrow NHATS target - DOU
7.42 LD yesterday 2018 UY1 51 m  7.43 to 7.71 LD Nov. 1 - 8 NHATS target
7.62 LD yesterday 2018 VA1 14 m  7.70 to 8.14 LD Oct. 31 - Nov. 8 NHATS target - DOU
7.77 LD today 2018 TF3 292 m  7.77 LD yesterday - Nov. 7 Earth closest at 1759 UTC
8.66 LD tomorrow 2018 VN1 20 m  8.71 from 8.92 LD Nov. 2 - 11 NHATS target

This report was generated at 2240 UTC with the discovery of approaching 2018 VS1 (MPEC), and with follow-up in today's DOU MPEC for seven objects in the active traffic tables here above and below, and for departed objects 2018 VD and 2018 UC2, plus astrometry from early October for 2018 TH3, 2018 TD3, and 2018 TB3.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
3.6   LD Nov. 10* 2018 VS1 16 m  11.5 from 13.8 LD tomorrow - Nov. 14 NEW, EPU +/- 16 mins.* - MPEC
9.41 LD Nov. 13 2018 UQ1 142 m  24.10 from 26.74 LD Nov. 12 - 15 DOU
7.4   LD Nov. 27* 2008 WD14 89 m  43.7 from 45.6 LD Nov. 23 - 30 EPU +/- 2.04 days*
4.1   LD Dec. 9* 2013 VX4 62 m  47.6 from 48.9 LD Dec. 3 - 15 EPU +/- 2.35 days*
7.36 LD Dec. 22 163899 2003 SD220 1.17 km  58.05 from 59.03 LD Dec. 17 - 26 NHATS target
7.3   LD Jan. 9* 2013 YM2 19 m  58.5 from 59.1 LD Jan. 2 - 16 EPU +/- 1.25 days*, NHATS target
* EPU = Earth passage uncertainty


<< Reading:  SFY/Bad Astronomy has an article today about JAXA's Hayabusa2 spacecraft delicately approaching the very rough surface of PHA 162173 Ryugu (1999 JU3) in practice for surface sampling. Writer Phil Plait also recently noted how similar Ryugu appears to be to risk-listed 101955 Bennu (1999 RQ36), which is now being visited by NASA's OSIRIS-REx sample-return mission.
        The AMS has posted a page with information about a fireball widely observed over Missouri and surrounding states in the evening of November 2nd, local time.



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 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 5 November '18

The MPC's NEO Confirmation Page has 63 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 63 objects listed. Of these, 46 were "one nighters." So far The Tracking News has counted a total of 71 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 November '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-V47 - "17:11 UT" - 2018 VS1


MPEC 2018-V46 - "17:07 UT" - 2018 VR1


MPEC 2018-V45 - "17:03 UT" - 2018 VQ1


MPEC 2018-V44 - "16:32 UT" - 2011 GM62


<< DOU on 5 Nov. '18 >>  MPEC 2018-V43 - "12:06 UT" - Daily Orbit Update

Observers  on 5 November '18

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPEC 2018-V43 -- 2018 VY, 2018 TW2, 2018 TT2, 2018 TS5, 2018 TS, 2018 TQ3, 2018 TO3, 2018 TK3, 2018 TH3, 2018 TG3, 2018 TD3, 2018 TB3, 2018 SZ2, 2018 RR8, 2018 PT20, 2018 KT, 2018 KR2, 90416, 162980
T08ATLAS Mauna Loa in Hawaii, 12 in MPEC 2018-V43 -- 2018 VY, 2018 UG3, 2015 NU2, 65706, 523631, 457260, 454177, 450779, 325769, 277473, 16816, 3552
160Castelmartini Obs. in Italy, 9 in MPEC 2018-V43 -- 2011 UA, 523631, 518635, 455594, 418929, 413260, 163818, 115052, 1865
703Catalina Sky Survey (CSS) in Arizona, 38 in MPEC 2018-V43 -- 2018 VC, 2018 UR2, 2018 UQ2, 2018 UJ1, 2018 UG3, 2018 RL, 2018 PJ22, 2018 PE22, 2015 UC67, 2007 UL12, 88263, 54660, 523621, 48603, 455550, 446924, 443923, 442742, 438429, 414903, 413002, 397847, 375505, 31210, 252558, 21088, 18109, 17274, 155334, 155140, 153591, 12538, 6456, 5797, 5143, 5131, 3288, 1865
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-V43 -- 2018 UC2
K88GINOP-KHK in Hungary, 3 in MPEC 2018-V43 -- 2018 VY, 2018 VA1, 2013 VD13
J95Great Shefford Obs. in England, 1 in MPEC 2018-V43 -- 2018 VB
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2018-V45 -- 2018 VQ1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2018-V46 & 2018-V47 -- 2018 VS1, 2018 VR1
A06Mataro Obs. in Spain, 1 in MPEC 2018-V43 -- 2018 VC
474Mt. John Obs. in New Zealand, 2 in MPECs 2018-V46 & 2018-V47 -- 2018 VS1, 2018 VR1
G96Mt. Lemmon Survey (MLS) in Arizona, 23 in MPECs 2018-V43, 2018-V46 & 2018-V47 -- 2018 VS1, 2018 VR1, 2018 VD, 2018 UX1, 2018 UN1, 2018 UD1, 2018 TS5, 2018 PJ22, 2015 TN237, 96744, 96189, 523815, 518638, 518635, 514652, 481394, 446791, 37336, 329390, 17511, 140333, 137032, 136773
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-V43 -- 2018 VC
I41Palomar Transient Factory (PTF) in southern California, 4 in MPEC 2018-V43 -- 54401, 31345, 275611, 115052
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2018-V43 -- 2018 TS5
L04ROASTERR-1 in Romania, 1 in MPEC 2018-V43 -- 2018 VY
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2018-V43 -- 2018 VY
C95SATINO-1 in France, 1 in MPEC 2018-V43 -- 2018 VC
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-V43 -- 2018 UJ1
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-V43 -- 2018 VC
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2018-V43 -- 2018 VC, 2018 TS, 2018 OB1, 442742, 306595
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2018-V43 -- 2018 TM6, 2018 MW6, 2016 BU13, 2014 AA33
I52Steward Obs. Mt. Lemmon Station in Arizona, 8 in MPECs 2018-V43, 2018-V46 & 2018-V47 -- 2018 VS1, 2018 VR1, 2018 VL, 2018 VD, 2018 VC, 2018 UQ2, 2018 UQ1, 2018 UG3
381Tokyo-Kiso Obs. in Japan, 1 in MPEC 2018-V43 -- 2018 VG
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPECs 2018-V43 & 2018-V44 -- 2018 VC, 2018 TG6, 2011 GM62
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 November '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
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
2018 VP1NEODyS16502020-203521.22e-04-5.34-5.340NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2018-11-03.273 to 2018-11-04.377."
2018 VCJPL Sentry16502109-211775.3033e-06-6.41-6.710JPL: Computed at 07:04 today Pacific time based on 72 observations spanning 3.0541 days (2018-Nov-01.24873 to 2018-Nov-04.30287). Diameter approximately 0.018 km. from weighted mean H=26.36.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

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 5 November '18

Times are UTC for when items were noted or added by The Tracking News.

2240Generated Traffic Report
1730Grabbed MPEC 2018-V45 - 2018 VQ1 - see above
Grabbed MPEC 2018-V46 - 2018 VR1 - see above
Grabbed MPEC 2018-V47 - 2018 VS1 - see above
1650Noted that JPL Sentry has updated its 2018 VC risk assessment - see above
Noted that NEODyS has posted 2018 VP1 as an impact risk - see above
Grabbed MPEC 2018-V43 - Daily Orbit Update - see above
Grabbed MPEC 2018-V44 - 2011 GM62 - see above