Contents  on 15 March '16

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 March '16

Eleven objects reported inside ten LD

Today eleven transient natural objects are known to be passing through our traffic reporting "bubble," defined as having a radius of ten lunar distances (LD) from our home planet. Risk-listed 2016 EM156 is the nearest, moving in from 2.90 to 1.48 LD, sliding into Earth's sphere of gravitational influence (SOI), and coming its closest to the Moon on this passage -- 1.98 LD at 2310 UTC. 2016 EW85 also enters the SOI, slipping in from 4.72 to 2.14 LD.

Out further, two newly announced NHATS targets are inbound: 2016 EO156 from 6.44 to 5.39 LD and 2016 EN156 from 7.85 to 6.14 LD. And at the bubble's limit, 2016 EF156 enters from 11.13 to 8.33 LD, as does 2016 ES155, from 14.13 to 9.91 LD, and newly discovered 2016 EL157, from 10.12 to 7.89 LD, while risk-listed NHATS target 2016 EV84 leaves, escaping from 9.83 to 11.11 LD, and newly announced 2016 EM157, from 9.24 to 11.15 LD.

On approach next, radar/NHATS target 2010 FX9 is calculated to arrive inside ten LD tomorrow, but with an Earth passage uncertainty of +/- 14.87 hours.

Closest I D ~Size Distance Today  Notes - New Data
1.38 LD tomorrow2016 EM156 10 m  1.48 from 2.90 LD enters Earth SOI, Moon closest 1.98 LD at 2310 UTC, risk - DOU
1.39 LD March 82016 EU84 6 m  3.98 to 4.50 LD NHATS target
1.43 LD tomorrow2016 EW85 10 m  2.14 from 4.72 LD enters Earth SOI - DOU
1.56 LD March 192016 EN156 10 m  6.14 from 7.85 LD NEW, NHATS target - MPEC
2.31 LD March 102016 EM157 13 m  9.24 to 11.15 LD NEW, exits ten LD - MPEC
3.07 LD tomorrow2016 ES85 4 m  3.08 from 3.22 LD NHATS target - DOU
3.54 LD March 192016 EO156 5 m  5.39 from 6.44 LD NEW, NHATS target - MPEC, DOU
4.54 LD March 182016 EL157 15 m  7.89 from 10.12 LD NEW, enters ten LD - MPEC
5.75 LD March 172016 ES155 48 m  9.93 from 14.15 LD enters ten LD - DOU
6.70 LD March 172016 EF156 38 m  8.33 from 11.13 LD enters ten LD - DOU
6.80 LD March 102016 EV84 15 m  9.83 to 11.11 LD exits ten LD, NHATS target, risk - DOU
Approaching
4.9   LD April 162008 HU4 8 m  < 10 LD March 20, uncertainty +/- 6.6000 hours, NHATS target, risk
6.9   LD March 192010 FX9 49 m  < 10 LD tomorrow, uncertainty +/- 14.8667 hours, radar/NHATS target
7.72 LD April 132005 GR33 135 m  < 10 LD April 11 - MPEC
8.30 LD March 242016 EQ1 21 m  < 10 LD March 19, NHATS target
9.21 LD March 22P/2016 BA14 (Panstarrs) 429 m  < 10 LD March 21
9.79 LD March 292016 BC14 217 m  < 10 LD March 28, NHATS target - DOU

This report was updated at 1944 UTC with new discoveries 2016 EM157 (MPEC) and 2016 EL157 (MPEC) and to note new data in today's DOU MPEC for eight nearby or approaching objects (see table immediately above, listings marked with "DOU") and for three departed objects: 2016 EJ27, NHATS target 2016 EO55, and risk-listed 2016 EK85, as well as observation of distant 68216 2001 CV26.
        This day's first local traffic report was generated at 0520 UTC with new discoveries 2016 EO156 (MPEC) and, announced late yesterday, 2016 EN156 (MPEC), plus the recovery of approaching 2005 GR33 (MPEC).



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not currently so close. 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 15 March '16

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 86 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 15 March '16

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been seventeen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2016-E188 - "23:00 UT" - Comet 332P-A/Ikeya-Murakami


MPEC 2016-E187 - "22:39 UT" - 2016 EN157


MPEC 2016-E186 - "17:08 UT" - 2016 EM157


MPEC 2016-E185 - "17:05 UT" - 2016 EH157


MPEC 2016-E184 - "17:02 UT" - 2016 EB157


MPEC 2016-E183 - "16:59 UT" - 2016 EL157


MPEC 2016-E182 - "16:41 UT" - 2016 EK157


MPEC 2016-E181 - "16:37 UT" - 2016 EJ157


MPEC 2016-E180 - "16:35 UT" - 2016 EG157


MPEC 2016-E179 - "16:32 UT" - 2016 EF157


MPEC 2016-E178 - "16:29 UT" - 2016 EE157


MPEC 2016-E177 - "16:26 UT" - 2016 ED157


MPEC 2016-E176 - "16:23 UT" - 2016 EC157


<< DOU on 15 Mar. '16 >>  MPEC 2016-E175 - "13:06 UT" - Daily Orbit Update


MPEC 2016-E174 - "12:54 UT" - 1998 SH2 = 2016 EC156

Id. Rob Matson, Gareth Williams


MPEC 2016-E173 - "03:15 UT" - 2005 GR33


MPEC 2016-E172 - "02:17 UT" - 2016 EO156

Observers  on 15 March '16

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2016-E175 -- 163243, 3122, 1863, 1685
300Bisei Spaceguard Center in Japan, 1 in MPEC 2016-E185 -- 2016 EH157
160Castelmartini Obs. in Italy, 3 in MPECs 2016-E175 & 2016-E185 -- 2016 EH157, 2016 EF156, 2015 XB379
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2016-E175, 2016-E183, 2016-E185, 2016-E186 & 2016-E188 -- 2016 EO55, 2016 EM157, 2016 EL157, 2016 EH157, 2016 CB138, 2015 OL35, 85953, 459872, 427684, 411201, 40267, 356285, 337866, 162038, 154652, 138325, 332P
U78Cedar Glen Obs. in southern California, 1 in MPEC 2016-E175 -- 2015 OL35
K51Celado Obs. in Italy, 4 in MPECs 2016-E175, 2016-E183, 2016-E185 & 2016-E186 -- 2016 EM157, 2016 EL157, 2016 EK156, 2016 EH157
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2016-E175, 2016-E176, 2016-E177 & 2016-E179 -- 2016 EZ27, 2016 EP55, 2016 EO85, 2016 EM28, 2016 EF157, 2016 ED157, 2016 EC157, 2016 CX30, 2016 CU193, 2016 CQ195, 2016 CP247, 2016 CK246, 2016 CA193, 2016 BA40, 2016 AJ193
A77Chante-Perdrix Obs. in France, 1 in MPEC 2016-E188 -- 332P
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2016-E188 -- 332P
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2016-E183 & 2016-E185 -- 2016 EL157, 2016 EH157
F65*program code "*" (19) via Faulkes Telescope North in Hawaii, 1 in MPEC 2016-E188 -- 332P
372Geisei Obs. in Japan, 1 in MPEC 2016-E188 -- 332P
J95Great Shefford Obs. in England, 6 in MPECs 2016-E172, 2016-E175, 2016-E183, 2016-E185 & 2016-E186 -- 2016 ES155, 2016 EO156, 2016 EM157, 2016 EM156, 2016 EL157, 2016 EH157
A21Irmtraut Obs. in Germany, 1 in MPEC 2016-E188 -- 332P
246KLENOT in the Czech Republic, 3 in MPEC 2016-E175 -- 2016 EW85, 2016 EP1, 2015 XB379
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2016-E177 -- 2016 ED157
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2016-E175 -- 2016 EF156
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2016-E175 -- 9400, 8013
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2016-E175 -- 2016 CL195
568_Marco Micheli on Mauna Kea in Hawaii, 5 in MPECs 2016-E176, 2016-E177, 2016-E179, 2016-E180 & 2016-E187 -- 2016 EN157, 2016 EG157, 2016 EF157, 2016 ED157, 2016 EC157
900Moriyama Obs. in Japan, 2 in MPECs 2016-E183 & 2016-E188 -- 2016 EL157, 332P
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2016-E172, 2016-E175, 2016-E183, 2016-E184, 2016-E185 & 2016-E186 -- 2016 EO156, 2016 EM157, 2016 EL157, 2016 EH157, 2016 EB157, 2015 BB511, 275976, 6050, 5693
C23Olmen Obs. in Belgium, 1 in MPEC 2016-E188 -- 332P
J43Oukaimeden Obs. in Morocco, 2 in MPECs 2016-E175 & 2016-E188 -- 2016 CB30, 332P
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2016-E175, 2016-E176, 2016-E177, 2016-E178, 2016-E179, 2016-E180, 2016-E181, 2016-E182, 2016-E184 & 2016-E187 -- 2016 EN157, 2016 EK157, 2016 EJ157, 2016 EG157, 2016 EF157, 2016 EE157, 2016 ED157, 2016 EC157, 2016 EB157, 2015 OL35, 2008 GU20, 2008 DL5, 85953, 433953, 35396, 317685, 163249, 161998, 155341
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 22 in MPEC 2016-E175 -- 2016 EP1, 2016 EF28, 2016 DP, 2016 BC14, 2015 XB379, 2015 WH9, 2012 HR15, 85953, 68216, 455148, 450160, 31221, 275974, 20826, 185851, 162510, 154807, 154555, 152931, 9400, 8013, 7350
586Pic du Midi Obs. in France, 1 in MPEC 2016-E188 -- 332P
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPEC 2016-E175 -- 185851, 154807, 8013
L04ROASTERR-1 in Romania, 1 in MPEC 2016-E185 -- 2016 EH157
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2016-E183, 2016-E185 & 2016-E186 -- 2016 EM157, 2016 EL157, 2016 EH157
H36Sandlot Obs. in Kansas, 1 in MPEC 2016-E185 -- 2016 EH157
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2016-E175 -- 2016 EP1, 2016 CJ30
G45Space Surveillance Telescope Atom Site (SST Atom Site) in New Mexico, 9 in MPEC 2016-E175 -- 2016 CB138, 2015 OL35, 309203, 276703, 267136, 162463, 154807, 5332, 1866
691Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2016-E174, 2016-E175, 2016-E180 & 2016-E183 -- 2016 ES84, 2016 EL157, 2016 EK27, 2016 EJ56, 2016 EJ156, 2016 EG157, 2016 EF86, 2016 ED85, 2016 ED28, 2016 EC156, 8013
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2016-E175, 2016-E178, 2016-E181 & 2016-E182 -- 2016 EZ26, 2016 EV1, 2016 EU85, 2016 ER28, 2016 EP85, 2016 EK85, 2016 EK157, 2016 EK156, 2016 EJ56, 2016 EJ157, 2016 EG86, 2016 EG55, 2016 EE157, 2016 DW21, 2009 EK1
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2016-E172, 2016-E175, 2016-E183, 2016-E184 & 2016-E186 -- 2016 ES28, 2016 EO156, 2016 EM157, 2016 EL157, 2016 EB157
926Tenagra II Obs. in Arizona, 24 in MPECs 2016-E172, 2016-E173, 2016-E175, 2016-E176, 2016-E179, 2016-E180, 2016-E181, 2016-E183 & 2016-E185 -- 2016 EW85, 2016 EV84, 2016 ES85, 2016 ES155, 2016 ES1, 2016 EP1, 2016 EO156, 2016 EL27, 2016 EL157, 2016 EJ27, 2016 EJ157, 2016 EH157, 2016 EG157, 2016 EG156, 2016 EF28, 2016 EF157, 2016 EC157, 2016 CB138, 2016 BA40, 2015 XB379, 2015 WH9, 2015 TJ1, 2010 VU198, 2005 GR33
C51WISE in Earth polar orbit, 2 in MPEC 2016-E175 -- 2016 CK246, 162463
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 March '16

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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
2016 EM156NEODyS17312108-211627.34e-06-6.79-6.820NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2016-03-14.290 to 2016-03-14.865."
JPL Sentry1701R E M O V E DJPL #2 for the day: Risk listing removed at 1638 UTC.
2016 EC156NEODyS1731206919.07e-08-4.83-4.830NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2016-03-10.231 to 2016-03-14.389."
2016 EG86NEODyS17312087-210522.33e-06-5.54-5.60NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2016-03-11.334 to 2016-03-15.208."
JPL Sentry17012087-210532.5e-06-5.50-5.560JPL: "Analysis based on 22 observations spanning 3.8739 days (2016-Mar-11.33297 to 2016-Mar-15.2069)." Diameter approximately 0.042 km. from mean, weighted H=24.5.
2016 EU85NEODyS17312042-2109221.3e-05-2.33-2.810NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2016-03-06.331 to 2016-03-15.145."
JPL Sentry17302047-2109241.2e-05-2.36-2.830JPL: "Analysis based on 21 observations spanning 8.8142 days (2016-Mar-06.33009 to 2016-Mar-15.14432)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
2016 EK85NEODyS1731210642.4e-06-6.23-6.320NEODyS: "Based on 67 optical observations (of which 0 are rejected as outliers) from 2016-03-09.101 to 2016-03-15.483."
JPL Sentry1730210652.0e-06-6.31-6.400JPL: "Analysis based on 67 observations spanning 6.3823 days (2016-Mar-09.09989 to 2016-Mar-15.48215)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
2016 EV84JPL Sentry18302056-209242.5e-06-6.68-6.770JPL: "Analysis based on 86 observations spanning 4.7222 days (2016-Mar-10.45216 to 2016-Mar-15.17435)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
NEODyS17312073-209241.07e-06-7.04-7.390NEODyS: "Based on 88 optical observations (of which 2 are rejected as outliers) from 2016-03-10.453 to 2016-03-15.175."
2016 EP84NEODyS17312047-2115222.49e-05-6.04-6.260NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2016-03-07.389 to 2016-03-14.197."
2016 EZ26JPL Sentry1616R E M O V E DJPL: Risk listing removed at 1603 UTC.
2016 EV1JPL Sentry1616R E M O V E DJPL: Risk listing removed at 1604 UTC.
2016 CO248NEODyS17312045-2095103.46e-07-7.76-8.170NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2016-02-11.431 to 2016-03-03.383."
1998 SH2NEODyS1616R E M O V E D-
JPL Sentry1616R E M O V E DJPL: Risk listing removed at 1543 UTC.

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 March '16

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

2328Grabbed MPEC 2016-E187 - 2016 EN157 - see above
Grabbed MPEC 2016-E188 - Comet 332P-A/Ikeya-Murakami - see above
1944Updated Traffic Report
1830Noted that JPL Sentry has updated its 2016 EV84 risk assessment - see above
1731Noted that NEODyS has updated its 2016 CO248 risk assessment - see above
Noted that NEODyS has updated its 2016 EG86 risk assessment - see above
Noted that NEODyS has updated its 2016 EK85 risk assessment - see above
Noted that NEODyS has updated its 2016 EP84 risk assessment - see above
Noted that NEODyS has updated its 2016 EU85 risk assessment - see above
Noted that NEODyS has updated its 2016 EV84 risk assessment - see above
1730Noted that NEODyS has posted 2016 EC156 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 EK85 risk assessment - see above
Noted that NEODyS has posted 2016 EM156 as an impact risk - see above
Noted that JPL Sentry has updated its 2016 EU85 risk assessment - see above
Grabbed MPEC 2016-E183 - 2016 EL157 - see above
Grabbed MPEC 2016-E184 - 2016 EB157 - see above
Grabbed MPEC 2016-E185 - 2016 EH157 - see above
Grabbed MPEC 2016-E186 - 2016 EM157 - see above
1701Noted that JPL Sentry has updated its 2016 EG86 risk assessment - see above
Noted that JPL Sentry has removed 2016 EM156 as an impact risk - see above
1700Grabbed MPEC 2016-E176 - 2016 EC157 - see above
Grabbed MPEC 2016-E177 - 2016 ED157 - see above
Grabbed MPEC 2016-E178 - 2016 EE157 - see above
Grabbed MPEC 2016-E179 - 2016 EF157 - see above
Grabbed MPEC 2016-E180 - 2016 EG157 - see above
Grabbed MPEC 2016-E181 - 2016 EJ157 - see above
Grabbed MPEC 2016-E182 - 2016 EK157 - see above
1616Noted that JPL Sentry has removed 1998 SH2 as an impact risk - see above
Noted that NEODyS has removed 1998 SH2 as an impact risk - see above
Noted that JPL Sentry has removed 2016 EV1 as an impact risk - see above
Noted that JPL Sentry has removed 2016 EZ26 as an impact risk - see above
Grabbed MPEC 2016-E174 - 1998 SH2 = 2016 EC156 - see above
Grabbed MPEC 2016-E175 - Daily Orbit Update - see above
0326Grabbed MPEC 2016-E173 - 2005 GR33 - see above
0238Grabbed MPEC 2016-E172 - 2016 EO156 - see above
0019Noted that JPL Sentry has posted 2016 EM156 as an impact risk - see above