Contents  on 13 March '17

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 13 March '17

Four objects reported inside ten LD

Four transient natural objects are known to be within ten lunar distances (LD) of our planet today. Nearest is 2017 EK, which comes its closest to Earth this time around -- 4.96 LD at 2334 UTC.

Earth passage I D ~Size Distance Today  Notes
4.04 LD March 102017 DA36 32 m  5.25 to 6.40 LD NHATS target
4.38 LD March 172017 EG3 18 m  7.77 from 9.37 LD NHATS target
4.96 LD today2017 EK 52 m  4.96 LD Earth closest at 2334 UTC - DOU
7.77 LD March 112017 EE3 22 m  8.06 to 8.78 LD DOU

This report was generated at 1640 UTC with follow-up in today's DOU MPEC for two objects in the traffic tables here and for departed 2017 DV15.

Approaching (sorted by 10-LD bubble entry date)
8.34 LD March 161998 SL36 309 m  < 10 LD tomorrow, radar target
7.63 LD March 262015 TC25 4 m  < 10 LD March 17, radar/NHATS target, risk
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.92 LD May 292017 CS 438 m  < 10 LD May 26, radar target



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 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 13 March '17

The MPC's NEO Confirmation Page has 35 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 35 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 66 listings on the NEOCP today.

New MPECs  on 13 March '17

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 2017-E96 - "23:12 UT" - 2017 EN4


MPEC 2017-E95 - "23:10 UT" - 2017 EM4


MPEC 2017-E94 - "23:06 UT" - 2017 EL4


MPEC 2017-E93 - "23:03 UT" - 2017 EK4


MPEC 2017-E92 - "23:00 UT" - 2017 EJ4


MPEC 2017-E91 - "22:57 UT" - 2017 EH4


MPEC 2017-E90 - "22:54 UT" - 2017 EG4


MPEC 2017-E89 - "22:51 UT" - 2017 EF4


MPEC 2017-E88 - "22:47 UT" - 2017 EE4


MPEC 2017-E87 - "22:44 UT" - 2017 ED4


MPEC 2017-E86 - "18:49 UT" - Comet C/2017 E4 (Lovejoy)


MPEC 2017-E85 - "18:45 UT" - Comet C/2017 E3 (Panstarrs)


<< DOU on 13 Mar. '17 >>  MPEC 2017-E84 - "13:02 UT" - Daily Orbit Update


MPEC 2017-E83 - "10:48 UT" - 2012 HR69

Observers  on 13 March '17

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-E86 -- C/2017 E4
705"Kristie Nault via Apache Point Obs. in New Mexico, 14 in MPECs 2017-E84 & 2017-E90 -- 2017 EH3, 2017 EG4, 2017 EE3, 2017 ED3, 2017 EC, 2017 DW35, 2017 DV15, 2017 CY31, 2017 CK1, 2017 BG85, 2016 YU10, 2013 DL1, 2008 EY68, 1998 GC1
E23Arcadia Obs. in New South Wales, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2017-E84, 2017-E91 & 2017-E94 -- 2017 EL4, 2017 EH4, 2017 CR32, 2006 UM, 89830, 483656, 475665, 143404, 11398, 10636, 4055, 2329
W97Atacama Desert Obs. in Chile, 1 in MPEC 2017-E85 -- C/2017 E3
I47Auger Obs. in Argentina, 1 in MPEC 2017-E86 -- C/2017 E4
R58Beverly-Begg Obs., 1 in MPEC 2017-E84 -- 5604
Q80Birkdale Obs. in Queensland, 1 in MPEC 2017-E86 -- C/2017 E4
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-E91 -- 2017 EH4
Q68Blue Mountains Obs. in New South Wales, 2 in MPEC 2017-E84 -- 443103, 5604
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-E85 -- C/2017 E3
160Castelmartini Obs. in Italy, 14 in MPECs 2017-E84, 2017-E88 & 2017-E91 -- 2017 EH4, 2017 EE4, 2017 AC5, 483459, 475665, 388838, 370307, 143404, 141018, 137158, 5626, 4055, 3552, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
I39Cruz del Sur Obs. in Argentina, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2017-E91 -- 2017 EH4
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2017-E87, 2017-E91 & 2017-E96 -- 2017 EN4, 2017 EH4, 2017 ED4
K73Gravina Obs. in Italy, 1 in MPEC 2017-E84 -- 11398
J95Great Shefford Obs. in England, 6 in MPECs 2017-E84, 2017-E88, 2017-E91, 2017-E95 & 2017-E96 -- 2017 EN4, 2017 EM4, 2017 EK, 2017 EH4, 2017 EE4, 2017 EE3
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-E86 -- C/2017 E4
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E85 -- C/2017 E3
Q62&Artyom Novichonok in Russia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E86 -- C/2017 E4
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E86 -- C/2017 E4
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E86 -- C/2017 E4
Q625Cristovao Jacques in Brazil via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E86 -- C/2017 E4
Q626Erik Bryssinck in Belgium via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-E86 -- C/2017 E4
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-E85 -- C/2017 E3
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-E86 -- C/2017 E4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 10 in MPECs 2017-E87, 2017-E88, 2017-E89, 2017-E90, 2017-E91, 2017-E92, 2017-E93, 2017-E94, 2017-E95 & 2017-E96 -- 2017 EN4, 2017 EM4, 2017 EL4, 2017 EK4, 2017 EJ4, 2017 EH4, 2017 EG4, 2017 EF4, 2017 EE4, 2017 ED4
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2017-E87, 2017-E89, 2017-E90, 2017-E91, 2017-E92, 2017-E93, 2017-E94, 2017-E95 & 2017-E96 -- 2017 EN4, 2017 EM4, 2017 EL4, 2017 EK4, 2017 EJ4, 2017 EH4, 2017 EG4, 2017 EF4, 2017 ED4
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-E84 -- 11398
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2017-E85 & 2017-E88 -- 2017 EE4, C/2017 E3
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2017-E84 -- 96590, 54789, 485652, 347813, 152931, 12538, 5653, 5131, 4179, 3352, 1627, 433
X38Pueyrredon Obs. in Argentina, 1 in MPEC 2017-E85 -- C/2017 E3
W25RMS Obs., 2 in MPECs 2017-E88 & 2017-E91 -- 2017 EH4, 2017 EE4
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2017-E91 -- 2017 EH4
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-E87, 2017-E88 & 2017-E91 -- 2017 EH4, 2017 EE4, 2017 ED4
204Schiaparelli Obs. in Italy, 2 in MPECs 2017-E87 & 2017-E88 -- 2017 EE4, 2017 ED4
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-E86 -- C/2017 E4
W886J.L. Tuten in Arkansas via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-E85 -- C/2017 E3
W889program code 9 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-E86 -- C/2017 E4
Y00SONEAR in Brazil, 2 in MPECs 2017-E85 & 2017-E86 -- C/2017 E4, C/2017 E3
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2017-E94 -- 2017 EL4
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-E84 -- 5604
I52Steward Obs. Mt. Lemmon Station in Arizona, 8 in MPECs 2017-E87, 2017-E88, 2017-E90, 2017-E91, 2017-E92, 2017-E94, 2017-E95 & 2017-E96 -- 2017 EN4, 2017 EM4, 2017 EL4, 2017 EJ4, 2017 EH4, 2017 EG4, 2017 EE4, 2017 ED4
Q38Swan Hill Obs., 1 in MPEC 2017-E86 -- C/2017 E4
926Tenagra II Obs. in Arizona, 6 in MPECs 2017-E84, 2017-E86, 2017-E87, 2017-E88 & 2017-E91 -- 2017 EH4, 2017 EE4, 2017 ED4, 2017 EC, C/2017 E4, 90075
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-E83 -- 2012 HR69
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 March '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 JPL NEO Program 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 EM68JPL Sentry04152017-211511421.3e-05-5.31-5.650JPL: "Analysis based on 12 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183)." Diameter approximately 0.010 km. from mean, weighted H=27.8.

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 13 March '17

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

2330Grabbed MPEC 2017-E92 - 2017 EJ4 - see above
Grabbed MPEC 2017-E93 - 2017 EK4 - see above
Grabbed MPEC 2017-E94 - 2017 EL4 - see above
Grabbed MPEC 2017-E95 - 2017 EM4 - see above
Grabbed MPEC 2017-E96 - 2017 EN4 - see above
2300Grabbed MPEC 2017-E87 - 2017 ED4 - see above
Grabbed MPEC 2017-E88 - 2017 EE4 - see above
Grabbed MPEC 2017-E89 - 2017 EF4 - see above
Grabbed MPEC 2017-E90 - 2017 EG4 - see above
Grabbed MPEC 2017-E91 - 2017 EH4 - see above
2007Grabbed MPEC 2017-E85 - Comet C/2017 E3 (Panstarrs) - see above
Grabbed MPEC 2017-E86 - Comet C/2017 E4 (Lovejoy) - see above
1640Generated Traffic Report
1517Grabbed MPEC 2017-E83 - 2012 HR69 - see above
Grabbed MPEC 2017-E84 - Daily Orbit Update - see above
0415Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above