Contents  on 3 February '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 3 February '18

Six objects reported inside ten LD

There are six Solar-System small bodies reported less than ten lunar distances (LD) from our planet today. The two nearest are both inbound: 2018 AH12 from 5.60 to 5.35 LD and risk-listed 2018 BP6 from 8.31 to 5.70 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
0.73 LD Jan. 19 2018 BC 4 m  7.03 to 7.51 LD Dec. 30 - Feb. 9 intruder, NHATS target, risk
3.07 LD Jan. 23 2018 BJ6 7 m  8.82 to 9.58 LD Jan. 12 - tomorrow NHATS target
3.61 LD Jan. 30 2018 BQ6 11 m  8.35 to 10.46 LD Jan. 26 - today exits ten LD, risk
3.66 LD Feb. 5 2018 BP6 41 m  5.70 from 8.31 LD yesterday - Feb. 8 risk - DOU
5.31 LD tomorrow 2018 AH12 14 m  5.35 from 5.60 LD Jan. 28 - Feb. 12 NHATS target
6.7   LD Jan. 15* 2018 AV2 6 m  7.2 to 7.2 LD Nov. 10 - March 2 EPU +/- 9 mins.*, NHATS target, natural?

This report was generated at 1845 UTC with today's DOU MPEC carrying additional observation of departed 2018 BS6 and follow-up for inbound risk-listed 2018 BP6 and departed 2018 BQ.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
3.7   LD Feb. 24* 2017 DR109 10 m  34.7 from 36.6 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 267 m  43.09 from 44.39 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  67.6 from 69.9 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty



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 3 February '18

The MPC's NEO Confirmation Page has 33 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 33 objects listed. Of these, six were "one nighters."

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 3 February '18

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 3 Feb. '18 >>  MPEC 2018-C05 - "13:02 UT" - Daily Orbit Update

Observers  on 3 February '18

A total of 20 observers appear in today's MPEC.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2018-C05 -- 511684, 508912
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-C05 -- 507366
160Castelmartini Obs. in Italy, 2 in MPEC 2018-C05 -- 512245, 508912
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-C05 -- 508796
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPEC 2018-C05 -- 2018 BQ, 2018 BL3, 2018 BK3, 2018 BB, 2018 AM18, 2018 AG2, 2017 YQ3, 2017 YC8, 2017 YA8, 2017 YA2, 2017 XL62, 2017 VU14, 2017 VH2, 2017 TV4
X31Galilei Obs., 1 in MPEC 2018-C05 -- 2018 BP6
168Kourovskaya Obs. in Russia, 1 in MPEC 2018-C05 -- 512245
130Lumezzane Obs. in Italy, 3 in MPEC 2018-C05 -- 511684, 508912, 137052
C41MASTER-II Kislovodsk in Russia, 1 in MPEC 2018-C05 -- 3122
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-C05 -- 508912
C23Olmen Obs. in Belgium, 1 in MPEC 2018-C05 -- 1999 AF4
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2018-C05 -- 509191, 152742
204Schiaparelli Obs. in Italy, 2 in MPEC 2018-C05 -- 2018 BP1, 509352
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-C05 -- 511684
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2018-C05 -- 2017 VH2, 511808
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-C05 -- 68278
926Tenagra II Obs. in Arizona, 4 in MPEC 2018-C05 -- 2018 BS6, 2018 BD3, 262623, 185853
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-C05 -- 2017 FB1
C51WISE in Earth polar orbit, 4 in MPEC 2018-C05 -- 2017 TQ3, 85990, 85628, 1580
I15Wishing Star Obs. in Rhode Island, 8 in MPEC 2018-C05 -- 2015 SY16, 2015 NJ3, 2015 BS509, 509353, 36284, 333888, 6053, 1864
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 February '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2323 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 is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few 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 BP6JPL Sentry17092074-207411.254e-07-6.68-6.680JPL: Computed at 07:55 today Pacific time based on 49 observations spanning 6.6826 days (2018-Jan-27.35282 to 2018-Feb-03.03542). Diameter approximately 0.041 km. from weighted mean H=24.59.
NEODyS1709207411.58e-07-6.58-6.580NEODyS: "Based on 49 optical observations (of which 6 are rejected as outliers) from 2018-01-27.354 to 2018-02-03.036."
2017 FB1JPL Sentry17092098-210632.92563e-07-5.69-5.970JPL: Computed at 07:55 today Pacific time based on 49 observations spanning 36.957 days (2017-Mar-18.20739 to 2017-Apr-24.163996). Diameter approximately 0.071 km. from weighted mean H=23.39.
NEODyS17092092-210667.16e-07-5.32-5.540NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2017-03-18.208 to 2017-04-24.165."

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 3 February '18

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

1845Generated Traffic Report
1709Noted that JPL Sentry has updated its 2017 FB1 risk assessment - see above
Noted that NEODyS has updated its 2017 FB1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 BP6 risk assessment - see above
Noted that NEODyS has updated its 2018 BP6 risk assessment - see above
Grabbed MPEC 2018-C05 - Daily Orbit Update - see above