Contents  on 15 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 15 February '18

Eight objects reported inside ten LD

There are eight Solar-System small bodies reported within ten lunar distances (LD) of our home world today. Nearest is intruder 2018 CD3, which enters the Earth-Moon system, coming in from 1.68 LD, passing us at 0.92 LD at 2002 UTC, and moving out to 0.96 LD. Also inside Earth's SOI, 2018 CU2 comes its closest to Earth this time around, reaching 2.23 LD at 0416 UTC.

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
0.18 LD Feb. 9 2018 CB 22 m  7.41 to 8.86 LD Feb. 3 - 16 intruder, NHATS target - DOU
0.92 LD today 2018 CD3 6 m  0.92 LD Feb. 9 - 21 intruder today, NHATS target, Earth
closest at 2002 UTC - DOU
2.05 LD Feb. 12 2018 CH2 8 m  5.02 to 6.91 LD Feb. 7 - 17
2.23 LD today 2018 CU2 9 m  2.23 LD Feb. 10 - 20 Earth closest at 0416 UTC, Moon
closest 2.59 LD at 1231 UTC - DOU
5.65 LD Feb. 11 2018 CX 31 m  9.57 to 11.65 LD Feb. 8 - 15 exits ten LD
6.66 LD Jan. 15 2018 AV2 6 m  8.08 to 8.18 LD Nov. 10 - March 2 NHATS target, natural? - DOU
6.75 LD Feb. 13 2018 CR3 26 m  8.22 to 11.50 LD Feb. 12 - 15 exits ten LD
9.63 LD today 2018 CB1 27 m  9.63 LD yesterday - tomorrow Earth closest at 0429 UTC - DOU

This report was generated at 1918 UTC with follow-up in today's DOU MPEC for approaching 2018 CP2, 2018 CJ. and 2017 VR12, passing objects 2018 CU2, 2018 CB1, and intruder 2018 CD3, outbound objects 2018 AV2 and intruder 2018 CB, departed risk-listed 2018 BP6, and distant 208023 1999 AQ10.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
6.08 LD Feb. 19 2018 CP2 48 m  11.31 from 13.52 LD tomorrow - Feb. 22 DOU
3.7   LD Feb. 24* 2017 DR109 10 m  14.1 from 15.7 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
9.26 LD Feb. 20 2018 CJ 64 m  17.52 from 20.55 LD Feb. 19 - 21 DOU
3.76 LD March 7 2017 VR12 268 m  27.18 from 28.53 LD Feb. 28 - March 13 radar/NHATS target - DOU
6.9   LD March 10* 2015 DK200 26 m  41.9 from 43.9 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty


Reading:  On this, the fifth anniversary of the Chelyabinsk event, the European Space Agency has posted a photo of the impactor's trail with some notes and referencing Asteroid Day (June 30th, 110th anniversary of Tunguska event) happenings that kick off today.



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 approached Earth within ten LD since A/CC began these traffic reports eleven years ago but is not currently coming 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 15 February '18

The MPC's NEO Confirmation Page has 73 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 73 objects listed. Of these, 24 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 15 February '18

Minor Planet Electronic Circulars

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


MPEC 2018-C111 - "14:30 UT" - 1999 FN19


MPEC 2018-C110 - "14:28 UT" - 2017 XG62


MPEC 2018-C109 - "14:26 UT" - 2014 DX2


MPEC 2018-C108 - "14:20 UT" - 2017 BD29


MPEC 2018-C107 - "14:18 UT" - 2017 AH3


<< DOU on 15 Feb. '18 >>  MPEC 2018-C106 - "13:06 UT" - Daily Orbit Update

Observers  on 15 February '18

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-C108 -- 2017 BD29
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-C111 -- 1999 FN19
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2018-C106 -- 2018 BV1
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-C106 -- 2018 CQ3
151Eschenberg Obs. in Switzerland, 3 in MPEC 2018-C106 -- 2018 BA7, 2015 NJ3, 2007 LU19
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-C106 -- 136793
J95Great Shefford Obs. in England, 3 in MPEC 2018-C106 -- 2018 CU2, 2018 CT3, 2018 CD3
K38M57 Obs. in Italy, 1 in MPEC 2018-C106 -- 2015 FV118
108Montelupo Obs. in Italy, 6 in MPEC 2018-C106 -- 2018 CY2, 2017 SR32, 2004 CK39, 190208, 143992, 6053
474Mt. John Obs. in New Zealand, 4 in MPEC 2018-C106 -- 2018 CB1, 2018 CA2, 2017 XQ2, 2016 GA222
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-C106 -- 2018 AV2
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2018-C106 -- 505657, 6053
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2018-C110 -- 2017 XG62
408Nyukasa Obs. in Japan, 1 in MPEC 2018-C106 -- 2018 CY2
G34Oberfrauendorf Obs. in Germany, 5 in MPEC 2018-C106 -- 2004 CK39, 311554, 7977, 3122, 1980
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2018-C106 -- 17511
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-C106 -- 185853
K61Rokycany Obs. in the Czech Republic, 7 in MPEC 2018-C106 -- 2018 CZ2, 2018 CY2, 2018 CU1, 2018 CP2, 2018 CO2, 2018 CA, 2015 FV118
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-C106 -- 2017 VR12
C95SATINO-1 in France, 1 in MPEC 2018-C106 -- 2018 CB
204Schiaparelli Obs. in Italy, 2 in MPEC 2018-C106 -- 2018 CU2, 2018 BP6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPECs 2018-C106, 2018-C107 & 2018-C109 -- 2018 CJ, 2017 AH3, 2014 DX2
C51WISE in Earth polar orbit, 2 in MPEC 2018-C106 -- 511808, 208023
I15Wishing Star Obs. in Rhode Island, 8 in MPEC 2018-C106 -- 2017 SR32, 2007 LU19, 2004 CK39, 505657, 259802, 17511, 162882, 1864
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 February '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 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 Sentry16202074-207417.320e-08-6.90-6.900JPL: Computed at 07:55 today Pacific time based on 66 observations spanning 10.103 days (2018-Jan-27.35282 to 2018-Feb-06.45574). Diameter approximately 0.042 km. from weighted mean H=24.56.
2018 BN6NEODyS16202077-2117612.94e-05-5.62-5.770NEODyS: "Based on 48 optical observations (of which 3 are rejected as outliers) from 2018-01-27.195 to 2018-02-13.393."
2018 AB12NEODyS16202088-211723.29e-09-8.52-8.630NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2018-01-14.378 to 2018-02-13.384."
2017 LDNEODyS16202045-21175821.88e-03-4.24-4.960NEODyS: "Based on 101 optical observations (of which 5 are rejected as outliers) from 2017-05-16.299 to 2017-06-30.357."
2016 RD34NEODyS16202051-21162394.83e-04-4.65-5.00NEODyS: "Based on 84 optical observations (of which 7 are rejected as outliers) from 2016-09-11.431 to 2016-12-22.326."

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 15 February '18

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

1918Generated Traffic Report
1620Noted that NEODyS has updated its 2016 RD34 risk assessment - see above
Noted that NEODyS has updated its 2017 LD risk assessment - see above
Noted that NEODyS has updated its 2018 AB12 risk assessment - see above
Noted that NEODyS has updated its 2018 BN6 risk assessment - see above
Noted that JPL Sentry has updated its 2018 BP6 risk assessment - see above
Grabbed MPEC 2018-C106 - Daily Orbit Update - see above
Grabbed MPEC 2018-C107 - 2017 AH3 - see above
Grabbed MPEC 2018-C108 - 2017 BD29 - see above
Grabbed MPEC 2018-C109 - 2014 DX2 - see above
Grabbed MPEC 2018-C110 - 2017 XG62 - see above
Grabbed MPEC 2018-C111 - 1999 FN19 - see above