Contents  on 22 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 22 February '18

Six objects reported inside ten LD

There are six Solar-System small bodies reported within ten lunar distances (LD) of Earth today. Nearest are unrecovered 2017 DR109, calculated to be inbound from about 5.2 to 4.2 LD*, and risk-listed 2018 DB, which is outbound from 4.68 to 8.06 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
2.25 LD Feb. 20 2018 DB 10 m  4.68 to 8.06 LD Feb. 18 - 23 risk
3.7   LD Feb. 24* 2017 DR109 10 m  4.2 from 5.2 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
5.18 LD Feb. 24 2018 CE14 26 m  6.42 from 7.99 LD Feb. 20 - 28 NHATS target - DOU
5.43 LD Feb. 27 2018 CU14 10 m  6.98 from 7.65 LD Feb. 18 - March 8 NHATS target
6.08 LD Feb. 19 2018 CP2 48 m  8.29 to 10.19 LD Feb. 16 - 22 exits ten LD
6.66 LD Jan. 15 2018 AV2 6 m  8.84 to 8.96 LD Nov. 10 - March 2 NHATS target, natural?

This report was generated at 1852 UTC with first follow-up for aproaching 2018 DC in today's DOU MPEC along with continuing follow-up for inbound 2018 CE14, approaching 2017 VR12, and distant 2014 EY24. The DOU also has observation from April 2017 of 2011 PU1, adding 25.82 days to this previous intruder's 0.01-day recovery arc at a time when it was distant.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
3.76 LD March 7 2017 VR12 270 m  17.71 from 19.06 LD Feb. 28 - March 13 radar/NHATS target - DOU
9.27 LD March 3 2018 DC 38 m  18.57 from 20.21 LD March 1 - 5 NHATS target - DOU
6.9   LD March 10* 2015 DK200 26 m  28.5 from 30.4 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. "Distant" is used here to describe objects that have come within ten LD since A/CC began these traffic reports (2007) but are or were not so close during the reported observing period. Object temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 22 February '18

The MPC's NEO Confirmation Page has 30 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 36 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 22 February '18

Minor Planet Electronic Circulars

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


MPEC 2018-D40 - "22:26 UT" - 2018 DM


<< DOU on 22 Feb. '18 >>  MPEC 2018-D39 - "13:05 UT" - Daily Orbit Update


MPEC 2018-D38 - "11:45 UT" - 2018 DL


MPEC 2018-D37 - "11:42 UT" - 2018 CY14

Observers  on 22 February '18

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2018-D37 & 2018-D39 -- 2018 CY14, 2017 XG2, 2017 WK28, 2017 VX1, 2017 TJ1, 2017 SP19, 2016 AG165, 2014 VU1
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2018-D39 -- 154347, 12711, 11066, 8037, 3122
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2018-D39 -- 2017 SR32, 2014 EY24, 2012 DG61, 455659, 1981
107Cavezzo Obs. in Italy, 1 in MPEC 2018-D39 -- 276033
470Ceccano Obs. in Italy, 1 in MPEC 2018-D39 -- 2017 VR12
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2018-D39 -- 2018 CY1, 2018 CD1, 2018 BL6, 2018 BK3, 2018 AX3, 2018 AX, 2017 YA6, 2017 WY12, 2017 ST20
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2018-D39 -- 2018 CQ3
006Fabra Obs. in Spain, 2 in MPEC 2018-D39 -- 311554, 3752
734Farpoint Obs. in Kansas, 1 in MPEC 2018-D37 -- 2018 CY14
J95Great Shefford Obs. in England, 3 in MPECs 2018-D38, 2018-D39 & 2018-D40 -- 2018 DM, 2018 DL, 2018 CE14
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-D39 -- 2017 VR12
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2018-D40 -- 2018 DM
K74Muensterschwarzach Obs. in Germany, 4 in MPEC 2018-D39 -- 505657, 311554, 162882, 3752
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2018-D39 -- 252373
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2018-D39 -- 96590
C23Olmen Obs. in Belgium, 1 in MPEC 2018-D39 -- 2018 CU1
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2018-D37, 2018-D38, 2018-D39 & 2018-D40 -- 2018 DM, 2018 DL, 2018 CZ13, 2018 CY14, 2013 AA2, 1999 FN19, 1998 QP, 508871, 41429, 154652, 3102
K61Rokycany Obs. in the Czech Republic, 4 in MPEC 2018-D39 -- 2018 DG, 2018 DA, 2018 CU1, 2018 CP14
033Schwarzschild Obs. in Germany, 5 in MPECs 2018-D37, 2018-D38 & 2018-D39 -- 2018 DL, 2018 CZ2, 2018 CY14, 2018 BK7, 2017 SO17
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2018-D37, 2018-D38 & 2018-D39 -- 2018 DL, 2018 DC, 2018 CY14, 2018 CU1, 2018 CQ3, 2018 BK7, 2018 BJ7, 2018 BA7, 2017 RY15
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2018-D39 & 2018-D40 -- 2018 DM, 2018 DG, 2018 DC, 2018 CY2, 2018 CQ3, 2018 CP14, 2018 BB7
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-D39 -- 2018 DG
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-D39 -- 2011 PU1
C51WISE in Earth polar orbit, 2 in MPEC 2018-D39 -- 85990, 3122
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2018-D39 -- 311554
E08Wobblesock Obs. in New South Wales, 1 in MPEC 2018-D39 -- 2018 CP14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 February '18

At last check (NEODyS at 2358 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 22 February '18

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

2250Grabbed MPEC 2018-D40 - 2018 DM - see above
1852Generated Traffic Report
1642Grabbed MPEC 2018-D37 - 2018 CY14 - see above
Grabbed MPEC 2018-D38 - 2018 DL - see above
Grabbed MPEC 2018-D39 - Daily Orbit Update - see above