Contents  on 10 March '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 10 March '18

Seven objects reported inside ten LD

Seven transient natural objects are known to be less than ten lunar distances (LD) from our home world today. Nearest are 2018 DY3, inbound from 5.63 to 5.27 LD, 2017 VR12, outbound from 5.32 to 6.40 LD, and 2018 DC4, heading out from 5.62 to 6.35 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
2.87 LD March 7 2018 ES1 15 m  7.32 to 10.23 LD March 4 - 10 NEW, exits ten LD - MPEC
3.32 LD March 4 2018 DC4 11 m  5.62 to 6.35 LD Feb. 22 - March 15 NHATS target
3.76 LD March 7 2017 VR12 257 m  5.32 to 6.40 LD Feb. 28 - March 13 radar/NHATS target - DOU
4.18 LD Feb. 27 2018 DT 13 m  7.53 to 8.00 LD Feb. 11 - March 15 NHATS target - DOU
5.26 LD tomorrow 2018 DY3 20 m  5.27 from 5.63 LD March 6 - 15 NHATS target
6.04 LD March 5 2018 EW1 20 m  9.57 to 10.98 LD March 1 - 10 NEW, exits ten LD - MPEC
7.02 LD today 2015 DK200 26 m  7.02 LD March 6 - 14 NHATS target, Earth closest at 0645 UTC

This report was updated at 2330 UTC with five discoveries. Two of these are today departing our ten-LD traffic reporting zone, as seen in the above table -- 2018 EW1 and 2018 ES1, while another two are on approach, with details shown in the table immediately below -- 2018 EV1 and 2018 ET1, and the fifth has already departed. 2018 EX1 (MPEC) flew past at 8.18 LD on March 4th. Your first neighborhood asteroid traffic report was generated at 1846 UTC with the discoveries announced late yesterday of already departed objects 2018 EE1 (MPEC, DOU) went past Earth at 4.80 LD on March 4th, and 2018 ED1 (MPEC), which went by at 3.25 LD the day before. Today's DOU MPEC has first follow-up for approaching 2018 EH along with continuing follow-up for approaching 2018 DH1 and outbound objects 2018 DT and 2017 VR12, plus distant 450894 2008 BT18.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
4.37 LD March 18 2018 ET1 18 m  10.74 from 11.99 LD tomorrow - March 24 NEW - MPEC
9.19 LD March 15 2018 EH 45 m  14.03 from 15.99 LD March 13 - 16 DOU
7.7   LD March 22* 2018 EV1 28 m  29.8 from 32.3 LD March 19 - 24 NEW, EPU +/- 31 mins.* - MPEC
9.2   LD March 27* 2018 DH1 214 m  55.4 from 58.9 LD March 26 - 28 EPU +/- 5 mins.* - DOU
* 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 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 10 March '18

The MPC's NEO Confirmation Page has 66 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 66 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 91 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 10 March '18

Minor Planet Electronic Circulars

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


MPEC 2018-E58 - "21:30 UT" - 2018 EX1


MPEC 2018-E57 - "21:26 UT" - 2018 EW1


MPEC 2018-E56 - "21:23 UT" - 2018 EV1


MPEC 2018-E55 - "21:19 UT" - 2018 EU1


MPEC 2018-E54 - "21:16 UT" - 2018 ET1


MPEC 2018-E53 - "21:08 UT" - 2018 EO1 = 2013 LG7


MPEC 2018-E52 - "19:47 UT" - 2018 ES1


MPEC 2018-E51 - "19:44 UT" - 2018 ER1


MPEC 2018-E50 - "19:40 UT" - 2018 EQ1


MPEC 2018-E49 - "19:37 UT" - 2018 EP1


MPEC 2018-E48 - "19:33 UT" - 2018 EO1


MPEC 2018-E47 - "15:35 UT" - Comet 365P/Panstarrs


<< DOU on 10 Mar. '18 >>  MPEC 2018-E46 - "13:02 UT" - Daily Orbit Update


MPEC 2018-E45 - "02:00 UT" - 2018 EF1

Observers  on 10 March '18

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

CodeObserver / observatory
C97Al-Fulaij Obs., 11 in MPEC 2018-E46 -- 508871, 311554, 163243, 162882, 141484, 6053, 6050, 3752, 3122, 1981, 1980
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-E57 -- 2018 EW1
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-E56 & 2018-E58 -- 2018 EX1, 2018 EV1
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2018-E47 -- 365P
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-E45 -- 2018 EF1
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-E57 -- 2018 EW1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2018-E46, 2018-E50, 2018-E55, 2018-E56 & 2018-E57 -- 2018 EW1, 2018 EV1, 2018 EU1, 2018 EQ1, 2015 XE352
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-E45 -- 2018 EF1
K88GINOP-KHK in Hungary, 2 in MPECs 2018-E45 & 2018-E49 -- 2018 EP1, 2018 EF1
J95Great Shefford Obs. in England, 1 in MPEC 2018-E45 -- 2018 EF1
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-E49 -- 2018 EP1
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2018-E51 -- 2018 ER1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-E49, 2018-E52, 2018-E54, 2018-E57 & 2018-E58 -- 2018 EX1, 2018 EW1, 2018 ET1, 2018 ES1, 2018 EP1
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-E50 -- 2018 EQ1
474Mt. John Obs. in New Zealand, 3 in MPECs 2018-E51, 2018-E55 & 2018-E57 -- 2018 EW1, 2018 EU1, 2018 ER1
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPECs 2018-E46, 2018-E49, 2018-E52, 2018-E54 & 2018-E58 -- 2018 EX1, 2018 ET1, 2018 ES1, 2018 EP1, 2017 SL33, 2015 RL82, 2015 JA2, 2015 FV118, 2013 UG5, 2012 DG61, 86326, 505093, 459386, 281365, 27346, 164217, 141765, 111253, 3122, 1864
I41Palomar Transient Factory (PTF) in southern California, 10 in MPECs 2018-E46 & 2018-E47 -- 2018 DH1, 2015 XE352, 2001 FA58, 496861, 450894, 38091, 265196, 190208, 162011, 365P
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2018-E46, 2018-E48, 2018-E50, 2018-E51, 2018-E55 & 2018-E56 -- 2018 EV1, 2018 EU1, 2018 ER1, 2018 EQ1, 2018 EO1, 2009 BM2, 504928
K63Pascoli Obs. in Italy, 2 in MPECs 2018-E45 & 2018-E49 -- 2018 EP1, 2018 EF1
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2018-E49 -- 2018 EP1
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2018-E46, 2018-E52, 2018-E57 & 2018-E58 -- 2018 EX1, 2018 EW1, 2018 ES1, 2018 EE1
204Schiaparelli Obs. in Italy, 1 in MPEC 2018-E55 -- 2018 EU1
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-E46 -- 2017 VR12
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-E46 -- 2018 DH1
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2018-E46 -- 2018 DT, 2009 SK2
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2018-E46, 2018-E48, 2018-E50 & 2018-E55 -- 2018 EU1, 2018 EQ1, 2018 EO1, 2018 BT6
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2018-E46 -- 2018 CU1
I52Steward Obs. Mt. Lemmon Station in Arizona, 15 in MPECs 2018-E45, 2018-E46, 2018-E48, 2018-E49, 2018-E52, 2018-E54, 2018-E55, 2018-E56, 2018-E57 & 2018-E58 -- 2018 EX1, 2018 EW1, 2018 EV1, 2018 EU1, 2018 ET1, 2018 ES1, 2018 EP1, 2018 EO1, 2018 EH, 2018 EF1, 2018 DY1, 2018 DK1, 2018 DB4, 2018 DB2, 2018 BA7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-E46 -- 2016 UL5
L01Visnjan Obs., 3 in MPECs 2018-E45, 2018-E49 & 2018-E57 -- 2018 EW1, 2018 EP1, 2018 EF1
C51WISE in Earth polar orbit, 2 in MPEC 2018-E46 -- 508997, 496837
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 March '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
2008 EL68JPL Sentry19032018-21136103.27871153e-05-5.30-6.010JPL: Computed at 11:57 April 9th of 2017 Pacific time based on 8 observations spanning .07124 days (2008-Mar-06.40768 to 2008-Mar-06.47892). Diameter approximately 0.009 km. from weighted mean H=27.91.

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 10 March '18

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

2330Updated Traffic Report
2216Grabbed MPEC 2018-E53 - 2018 EO1 = 2013 LG7 - see above
Grabbed MPEC 2018-E54 - 2018 ET1 - see above
Grabbed MPEC 2018-E55 - 2018 EU1 - see above
Grabbed MPEC 2018-E56 - 2018 EV1 - see above
Grabbed MPEC 2018-E57 - 2018 EW1 - see above
Grabbed MPEC 2018-E58 - 2018 EX1 - see above
2005Grabbed MPEC 2018-E51 - 2018 ER1 - see above
Grabbed MPEC 2018-E52 - 2018 ES1 - see above
1942Grabbed MPEC 2018-E48 - 2018 EO1 - see above
Grabbed MPEC 2018-E49 - 2018 EP1 - see above
Grabbed MPEC 2018-E50 - 2018 EQ1 - see above
1903Noted that JPL Sentry has updated its 2008 EL68 risk assessment - see above
1656Grabbed MPEC 2018-E46 - Daily Orbit Update - see above
Grabbed MPEC 2018-E47 - Comet 365P/Panstarrs - see above
0434Grabbed MPEC 2018-E45 - 2018 EF1 - see above