Contents  on 15 September '15

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 September '15

Two objects reported inside ten LD

There are two asteroidal objects reported to be less than ten lunar distances (LD) from Earth today, both of them NASA-designated as Human Space Flight Accessible (NHATS) targets. 2015 RW35 heads out from 3.38 to 4.58 LD and risk-listed 2014 KS76 from 8.72 to 8.91 LD. Next known to be coming our way is NHATS/radar target 2014 UR, which arrives inside ten LD on October 8th.

This report was generated at 1603 UTC with follow-up in today's DOU MPEC for 2014 KS76 and departed NHATS/radar target 436724 2011 UW158 as well as astrometry from last month for NHATS target 2015 QH3.



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 15 September '15

The MPC's NEO Confirmation Page has 97 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 97 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 110 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 September '15

Minor Planet Electronic Circulars

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


MPEC 2015-R180 - "18:29 UT" - 2015 RB82


MPEC 2015-R179 - "17:08 UT" - 2015 RJ37


MPEC 2015-R178 - "16:41 UT" - 2015 RK37


MPEC 2015-R177 - "14:12 UT" - 2015 RD37


MPEC 2015-R176 - "14:09 UT" - 2015 RC37


MPEC 2015-R175 - "14:07 UT" - 2015 RB37


MPEC 2015-R174 - "12:57 UT" - 2006 HC2


<< DOU on 15 Sept. '15 >>  MPEC 2015-R173 - "12:04 UT" - Daily Orbit Update

Observers  on 15 September '15

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 40 in MPECs 2015-R173, 2015-R177, 2015-R178, 2015-R179 & 2015-R180 -- 2015 RZ35, 2015 RX2, 2015 RV1, 2015 RS1, 2015 RK37, 2015 RJ37, 2015 RE2, 2015 RD37, 2015 RB82, 2015 QT9, 2015 QN3, 2015 QM3, 2015 QH3, 2015 QG, 2015 QA, 2015 PU228, 2015 PS, 2015 PQ, 2015 OZ78, 2015 OT78, 2015 NS13, 2015 NP13, 2015 NK13, 2015 MS59, 2015 ML130, 2015 KL157, 2015 JY1, 2013 VM4, 2006 AW, 86666, 53426, 337084, 21088, 206378, 18172, 112985, 105140, 7822, 4055, 1036
300Bisei Spaceguard Center in Japan, 13 in MPEC 2015-R173 -- 2015 KQ154, 2015 HA1, 436775, 436030, 434096, 425713, 345646, 285331, 235756, 152679, 100756, 7889, 2063
073Bucharest Obs. in Romania, 1 in MPEC 2015-R173 -- 9400
160Castelmartini Obs. in Italy, 1 in MPEC 2015-R173 -- 436724
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2015-R173 & 2015-R177 -- 2015 RD37, 1999 RN28, 429094, 11054, 9400
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2015-R173 & 2015-R177 -- 2015 RD37, 86666
958Dax Obs. in France, 1 in MPEC 2015-R177 -- 2015 RD37
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2015-R173 -- 2015 PV228, 2001 RB12, 337248
Q60ISON-Siding Spring Obs. in New South Wales, 3 in MPEC 2015-R173 -- 2012 CL19, 428681, 154268
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2015-R180 -- 2015 RB82
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2015-R177 -- 2015 RD37
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2015-R177 -- 2015 RD37
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2015-R173 & 2015-R174 -- 2015 PU56, 2014 KS76, 2006 HC2
568=Peter Veres on Mauna Kea in Hawaii, 1 in MPEC 2015-R178 -- 2015 RK37
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2015-R173, 2015-R175 & 2015-R176 -- 2015 RZ36, 2015 RC37, 2015 RB37
900Moriyama Obs. in Japan, 1 in MPEC 2015-R177 -- 2015 RD37
474Mt. John Obs. in New Zealand, 2 in MPECs 2015-R177 & 2015-R180 -- 2015 RD37, 2015 RB82
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2015-R175, 2015-R176, 2015-R178, 2015-R179 & 2015-R180 -- 2015 RK37, 2015 RJ37, 2015 RC37, 2015 RB82, 2015 RB37
W95Panamanian San Pedro Atacama Obs. in Chile, 1 in MPEC 2015-R173 -- 2015 PR
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2015-R173 -- 2015 RS1, 2015 RH2, 2015 RF36, 2015 QT9, 2015 PS, 2015 PR, 2015 OZ78, 2015 MU59, 2015 ML130, 2012 RF15, 2007 RU9, 2006 WO1, 2001 RB12
L04ROASTERR-1 Obs. in Romania, 1 in MPEC 2015-R177 -- 2015 RD37
033Schwarzschild Obs. in Germany, 2 in MPECs 2015-R177 & 2015-R180 -- 2015 RD37, 2015 RB82
Y28Sertao de Itaparica Obs. (OASI) in Brazil, 5 in MPECs 2015-R173, 2015-R175 & 2015-R178 -- 2015 RK37, 2015 RB37, 2015 RA36, 2015 QO3, 2015 OA22
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2015-R173 -- 2015 HX116
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2015-R173 & 2015-R177 -- 2015 RD37, 2015 FS332
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2015-R173 -- 2006 KZ86
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2015-R173 -- 2015 QJ3
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2015-R175, 2015-R177 & 2015-R178 -- 2015 RK37, 2015 RD37, 2015 RB37
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2015-R173 -- 4055
461SZTE Asteroid Program in Hungary, 1 in MPEC 2015-R177 -- 2015 RD37
Q65Warrumbungle Obs. in New South Wales, 1 in MPEC 2015-R173 -- 2015 RS1
C51WISE in Earth polar orbit, 1 in MPEC 2015-R173 -- 190161
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2015-R173 -- 2015 FS332, 2001 UZ16, 53426, 163760
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 September '15

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
2015 RA36JPL Sentry1530205318.8e-09-5.27-5.270JPL: "Analysis based on 33 observations spanning 5.7265 days (2015-Sep-08.58604 to 2015-Sep-14.312514)." Diameter approximately 0.330 km. from mean, weighted H=20.1.
2015 PU228JPL Sentry1530208112.9e-08-4.95-4.950JPL: "Analysis based on 153 observations spanning 47.726 days (2015-Jul-24.586826 to 2015-Sep-10.312973)." Diameter approximately 0.320 km. from mean, weighted H=20.1.
2014 KS76JPL Sentry1530208912.5e-08-8.68-8.680JPL: "Analysis based on 45 observations spanning 473.32 days (2014-May-27.33428 to 2015-Sep-12.65393)." Diameter approximately 0.016 km. from mean, weighted H=26.6.

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 September '15

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

1900Grabbed MPEC 2015-R180 - 2015 RB82 - see above
1736Grabbed MPEC 2015-R178 - 2015 RK37 - see above
Grabbed MPEC 2015-R179 - 2015 RJ37 - see above
1603Generated Traffic Report
1530Noted that JPL Sentry has updated its 2014 KS76 risk assessment - see above
Noted that JPL Sentry has updated its 2015 PU228 risk assessment - see above
Noted that JPL Sentry has updated its 2015 RA36 risk assessment - see above
1500Grabbed MPEC 2015-R173 - Daily Orbit Update - see above
Grabbed MPEC 2015-R174 - 2006 HC2 - see above
Grabbed MPEC 2015-R175 - 2015 RB37 - see above
Grabbed MPEC 2015-R176 - 2015 RC37 - see above
Grabbed MPEC 2015-R177 - 2015 RD37 - see above