Contents  on 16 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 16 February '18

Seven objects reported inside ten LD

Today there are seven asteroids known to be within ten lunar distances (LD) of Earth. Nearest is intruder 2018 CD3, which leaves the Earth-Moon system, traveling out from 0.96 to 2.17 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
0.18 LD Feb. 9 2018 CB 22 m  8.86 to 10.31 LD Feb. 3 - 16 intruder, NHATS target, exits ten LD
0.92 LD yesterday 2018 CD3 6 m  0.96 to 2.17 LD Feb. 9 - 21 intruder today, NHATS target, Moon
closest 1.50 LD at 0614 UTC
2.05 LD Feb. 12 2018 CH2 8 m  6.91 to 8.87 LD Feb. 7 - 17
2.23 LD yesterday 2018 CU2 9 m  2.77 to 4.25 LD Feb. 10 - 20
6.08 LD Feb. 19 2018 CP2 48 m  9.28 from 11.31 LD today - Feb. 22 enters ten LD
6.66 LD Jan. 15 2018 AV2 6 m  8.18 to 8.28 LD Nov. 10 - March 2 NHATS target, natural?
9.63 LD yesterday 2018 CB1 27 m  9.85 to 10.69 LD Feb. 14 - 16 exits ten LD

This report was updated at 2218 UTC with the discovery of approaching 2018 CE14 (MPEC). Your first local asteroid traffic report was generated at 1940 UTC with follow-up in today's DOU MPEC for departed risk-lised 2018 CK and approaching objects 2018 CJ and 2017 VR12.

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  12.5 from 14.1 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
9.26 LD Feb. 20 2018 CJ 64 m  14.69 from 17.52 LD Feb. 19 - 21 DOU
5.17 LD Feb. 24 2018 CE14 25 m  18.32 from 20.56 LD Feb. 20 - 28 NEW - MPEC
3.76 LD March 7 2017 VR12 269 m  25.83 from 27.18 LD Feb. 28 - March 13 radar/NHATS target - DOU
6.9   LD March 10* 2015 DK200 26 m  39.9 from 41.9 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 16 February '18

The MPC's NEO Confirmation Page has 32 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 73 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 16 February '18

Minor Planet Electronic Circulars

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


MPEC 2018-D17 - "20:44 UT" - 2018 CK14


MPEC 2018-D16 - "20:41 UT" - 2018 CJ14


MPEC 2018-D15 - "20:37 UT" - 2018 CH14


MPEC 2018-D14 - "20:34 UT" - 2018 CG14


MPEC 2018-D13 - "20:30 UT" - 2018 CF14


MPEC 2018-D12 - "20:27 UT" - 2018 CE14


MPEC 2018-D11 - "20:21 UT" - 2018 CD14


MPEC 2018-D10 - "20:17 UT" - 2018 CC14


MPEC 2018-D09 - "20:14 UT" - 2018 CB14


MPEC 2018-D08 - "20:11 UT" - 2018 CA14


MPEC 2018-D07 - "20:08 UT" - 2018 CZ13


MPEC 2018-D06 - "20:05 UT" - 2018 CY13


MPEC 2018-D05 - "20:01 UT" - 2018 CU13


MPEC 2018-D04 - "19:57 UT" - 2018 CX13


MPEC 2018-D03 - "19:54 UT" - 2018 CW13


MPEC 2018-D02 - "19:51 UT" - 2018 CV13


<< DOU on 16 Feb. '18 >>  MPEC 2018-D01 - "13:05 UT" - Daily Orbit Update

Observers  on 16 February '18

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-D11 -- 2018 CD14
T08ATLAS Mauna Loa in Hawaii, 2 in MPEC 2018-D01 -- 2018 CJ, 509353
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2018-D04 -- 2018 CX13
Z84Calar Alto Schmidt in Spain, 3 in MPECs 2018-D09, 2018-D10 & 2018-D12 -- 2018 CE14, 2018 CC14, 2018 CB14
K51Celado Obs. in Italy, 4 in MPECs 2018-D02, 2018-D05, 2018-D09 & 2018-D12 -- 2018 CV13, 2018 CU13, 2018 CE14, 2018 CB14
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2018-D01, 2018-D06, 2018-D07, 2018-D08, 2018-D09, 2018-D11 & 2018-D14 -- 2018 CZ13, 2018 CY13, 2018 CY, 2018 CG14, 2018 CD14, 2018 CD1, 2018 CB14, 2018 CA14, 2018 BK3, 2018 AG2, 2017 VK2, 2016 NF
K65Cesena Obs. in Italy, 1 in MPEC 2018-D01 -- 2017 SL33
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-D12 -- 2018 CE14
734Farpoint Obs. in Kansas, 1 in MPEC 2018-D02 -- 2018 CV13
595Farra d'Isonzo Obs. in Italy, 5 in MPECs 2018-D01, 2018-D04, 2018-D09, 2018-D10 & 2018-D12 -- 2018 CX13, 2018 CE14, 2018 CC14, 2018 CB14, 2018 BK7
X31Galilei Obs., 1 in MPEC 2018-D01 -- 2018 CY2
J95Great Shefford Obs. in England, 9 in MPECs 2018-D01, 2018-D02, 2018-D05, 2018-D08, 2018-D09, 2018-D12, 2018-D13, 2018-D15 & 2018-D17 -- 2018 CY2, 2018 CV13, 2018 CU13, 2018 CK14, 2018 CH14, 2018 CF14, 2018 CE14, 2018 CB14, 2018 CA14
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-D01 -- 2018 CY2
V37LCO Fort Davis in Texas, 1 in MPEC 2018-D01 -- 2017 VR12
568_Marco Micheli on Mauna Kea in Hawaii, 9 in MPECs 2018-D09, 2018-D10, 2018-D11, 2018-D12, 2018-D13, 2018-D14, 2018-D15, 2018-D16 & 2018-D17 -- 2018 CK14, 2018 CJ14, 2018 CH14, 2018 CG14, 2018 CF14, 2018 CE14, 2018 CD14, 2018 CC14, 2018 CB14
474Mt. John Obs. in New Zealand, 5 in MPECs 2018-D01, 2018-D06, 2018-D08, 2018-D09 & 2018-D10 -- 2018 CY13, 2018 CC14, 2018 CB14, 2018 CA2, 2018 CA14
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2018-D02, 2018-D03, 2018-D04 & 2018-D05 -- 2018 CX13, 2018 CW13, 2018 CV13, 2018 CU13
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2018-D01 -- 2016 WE1
J69North Obs. in England, 1 in MPEC 2018-D01 -- 2018 CY2
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2018-D02, 2018-D06, 2018-D07, 2018-D08, 2018-D09, 2018-D10, 2018-D11, 2018-D12, 2018-D13, 2018-D14, 2018-D15, 2018-D16 & 2018-D17 -- 2018 CZ13, 2018 CY13, 2018 CV13, 2018 CK14, 2018 CJ14, 2018 CH14, 2018 CG14, 2018 CF14, 2018 CE14, 2018 CD14, 2018 CC14, 2018 CB14, 2018 CA14
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2018-D12 & 2018-D13 -- 2018 CF14, 2018 CE14
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-D12 -- 2018 CE14
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-D01 & 2018-D09 -- 2018 CB14, 2015 FV118
H36Sandlot Obs. in Kansas, 2 in MPECs 2018-D12 & 2018-D17 -- 2018 CK14, 2018 CE14
204Schiaparelli Obs. in Italy, 3 in MPECs 2018-D04, 2018-D09 & 2018-D12 -- 2018 CX13, 2018 CE14, 2018 CB14
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2018-D03 & 2018-D05 -- 2018 CW13, 2018 CU13
Z52The Studios Obs., 2 in MPEC 2018-D01 -- 36284, 1864
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2018-D01 -- 2018 CK, 162183
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2018-D01 -- 3122
L01Visnjan Obs., 6 in MPECs 2018-D03, 2018-D04, 2018-D12, 2018-D15, 2018-D16 & 2018-D17 -- 2018 CX13, 2018 CW13, 2018 CK14, 2018 CJ14, 2018 CH14, 2018 CE14
C42Xingming Obs. in China, 1 in MPEC 2018-D04 -- 2018 CX13
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 CKJPL Sentry17042070-207016.902e-09-8.76-8.760JPL: Computed at 07:55 today Pacific time based on 32 observations spanning 9.0199 days (2018-Feb-04.42012 to 2018-Feb-13.439985). Diameter approximately 0.018 km. from weighted mean H=26.39.
NEODyS17042070-208336.38e-08-7.83-8.070NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2018-02-04.421 to 2018-02-13.441."
2018 BP6NEODyS17042074-211533.0e-07-6.52-6.560NEODyS: "Based on 66 optical observations (of which 11 are rejected as outliers) from 2018-01-27.354 to 2018-02-06.457."
2011 CF66JPL Sentry17042018-21178331.42111809e-05-6.01-7.220JPL: Computed at 03:11 April 7th of 2017 Pacific time based on 11 observations spanning .17761 days (2011-Feb-13.33976 to 2011-Feb-13.51737). Diameter approximately 0.009 km. from weighted mean H=27.83.

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 16 February '18

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

2218Updated Traffic Report
2100Grabbed MPEC 2018-D02 - 2018 CV13 - see above
Grabbed MPEC 2018-D03 - 2018 CW13 - see above
Grabbed MPEC 2018-D04 - 2018 CX13 - see above
Grabbed MPEC 2018-D05 - 2018 CU13 - see above
Grabbed MPEC 2018-D06 - 2018 CY13 - see above
Grabbed MPEC 2018-D07 - 2018 CZ13 - see above
Grabbed MPEC 2018-D08 - 2018 CA14 - see above
Grabbed MPEC 2018-D09 - 2018 CB14 - see above
Grabbed MPEC 2018-D10 - 2018 CC14 - see above
Grabbed MPEC 2018-D11 - 2018 CD14 - see above
Grabbed MPEC 2018-D12 - 2018 CE14 - see above
Grabbed MPEC 2018-D13 - 2018 CF14 - see above
Grabbed MPEC 2018-D14 - 2018 CG14 - see above
Grabbed MPEC 2018-D15 - 2018 CH14 - see above
Grabbed MPEC 2018-D16 - 2018 CJ14 - see above
Grabbed MPEC 2018-D17 - 2018 CK14 - see above
1704Noted that JPL Sentry has updated its 2011 CF66 risk assessment - see above
Noted that NEODyS has updated its 2018 BP6 risk assessment - see above
Noted that JPL Sentry has updated its 2018 CK risk assessment - see above
Noted that NEODyS has updated its 2018 CK risk assessment - see above
Grabbed MPEC 2018-D01 - Daily Orbit Update - see above