Contents  on 29 September '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 29 September '17

Seven objects reported inside ten LD

Seven transient natural objects are reported to be inside ten lunar distances (LD) of Earth today, none closer than 2017 RB16, which is outbound from 7.30 to 9.03 LD.

Earth passage I D ~Size Distance Today  Notes
0.72 LD Sept. 242017 SU17 9 m  8.74 to 10.61 LD NEW, intruder, exits ten LD, risk - MPEC, DOU
4.76 LD Sept. 262017 RB16 25 m  7.30 to 9.03 LD
4.82 LD Sept. 262017 SU16 17 m  8.13 to 10.17 LD exits ten LD - DOU
4.96 LD Sept. 252017 RO16 10 m  7.65 to 9.14 LD
5.77 LD Sept. 222017 RB15 10 m  8.91 to 9.79 LD
7.87 LD today1989 VB 389 m  7.87 LD radar target, Earth closest at 2001 UTC
9.14 LD tomorrow2017 SH16 30 m  9.31 from 10.35 LD enters ten LD - DOU

This report was generated at 1838 UTC with the discovery of risk-listed outbound intruder 2017 SU17 (MPEC, DOU), and with first follow-up for inbound 2017 SH16 and departed risk-listed intruder 2017 SS12 in today's DOU MPEC plus additional observation of outbound 2017 SU16 and departed 2017 SR16, along with continuing follow-up for approaching risk-listed intruder and radar target 2012 TC4 and four departed objects: 2017 SE12, 2017 SR10, risk-listed 2017 RV2, and risk-listed intruder 2017 SQ2.

Approaching (sorted by 10-LD bubble entry date)
5.37 LD Oct. 32017 SS16 16 m  < 10 LD tomorrow
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, intruder, radar/NHATS target, risk - DOU
8.5   LD Oct. 132005 TE49 15 m  < 10 LD Oct. 11, uncertainty +/- 10.1167 hours, NHATS target
5.77 LD Oct. 22171576 1999 VP11 645 m  < 10 LD Oct. 20



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. 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.

Radar Astrometry  on 29 September '17

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2326 UTC when the database was dated 29 Sept.

NEOCP Activity  on 29 September '17

The MPC's NEO Confirmation Page has 135 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 135 objects listed. Of these, 58 were "one nighters." So far The Tracking News has counted a total of 167 listings on the NEOCP today.

New MPECs  on 29 September '17

Minor Planet Electronic Circulars

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


MPEC 2017-S214 - "22:23 UT" - 2017 SX17


MPEC 2017-S213 - "17:22 UT" - Comet P/2017 S5 (ATLAS)


<< DOU on 29 Sept. '17 >>  MPEC 2017-S212 - "12:04 UT" - Daily Orbit Update


MPEC 2017-S211 - "03:42 UT" - 2014 VU1


MPEC 2017-S210 - "02:13 UT" - 2017 SW17


MPEC 2017-S209 - "02:10 UT" - 2017 SV17


MPEC 2017-S208 - "02:08 UT" - 2017 SU17


MPEC 2017-S207 - "02:05 UT" - 2017 SP17


MPEC 2017-S206 - "00:32 UT" - 2017 ST17

Observers  on 29 September '17

A total of 47 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 99942
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2017-S206, 2017-S209, 2017-S210 & 2017-S212 -- 2017 SW17, 2017 SV17, 2017 ST17, 2017 SR10, 2017 SO10, 2017 SH10, 2017 SE12, 2017 RY15, 2017 RX15, 2017 RV2, 2017 RV15, 2017 RV1, 2017 RU15, 2017 RU1, 2017 RR15, 2017 RL16, 2017 QV34, 2017 QM18, 2017 FJ90
T05ATLAS Haleakala in Hawaii, 13 in MPECs 2017-S207, 2017-S208, 2017-S212 & 2017-S213 -- 2017 SU17, 2017 SP17, P/2017 S5, 65679, 52762, 496018, 333888, 190208, 143624, 143404, 8035, 1980, 1865
T08ATLAS Mauna Loa in Hawaii, 30 in MPECs 2017-S207, 2017-S212 & 2017-S213 -- 2017 SP17, P/2017 S5, 2017 RV1, 2017 RR15, 2004 TD10, 2004 SS, 1998 SB15, 1993 RA, 96744, 96631, 85709, 68348, 66146, 53319, 495848, 457768, 416584, 371336, 355770, 242211, 190166, 162998, 162566, 154268, 142464, 141670, 137799, 11405, 8035, 7336
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-S213 -- P/2017 S5
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-S214 -- 2017 SX17
160Castelmartini Obs. in Italy, 11 in MPECs 2017-S207 & 2017-S212 -- 2017 SP17, 2017 RV1, 2017 FJ90, 2016 AA9, 2004 TQ13, 2004 RE84, 68950, 496005, 250458, 220909, 142040
703Catalina Sky Survey (CSS) in Arizona, 31 in MPECs 2017-S207 & 2017-S212 -- 2017 ST14, 2017 SS12, 2017 SR16, 2017 SP17, 2017 SH16, 2017 QT35, 2017 OQ68, 2017 OP68, 2015 KN120, 2014 CD13, 2009 WC52, 2007 TR65, 2006 KA40, 2004 RE84, 90075, 65679, 55408, 496018, 495511, 338176, 333888, 253586, 190208, 162215, 159399, 143624, 143404, 11500, 6611, 2212, 1865
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2017-S212 -- 2017 QS32
A77Chante-Perdrix Obs. in France, 1 in MPEC 2017-S213 -- P/2017 S5
K26Contern Obs. in Luxembourg, 2 in MPEC 2017-S212 -- 2017 RV1, 2017 RL
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2017-S207 & 2017-S213 -- 2017 SP17, P/2017 S5
J27El Guijo Obs. in Spain, 4 in MPEC 2017-S212 -- 2004 SS, 2004 RE84, 220909, 142464
006Fabra Obs. in Spain, 2 in MPEC 2017-S212 -- 3122, 1980
K88GINOP-KHK in Hungary, 6 in MPECs 2017-S207, 2017-S212, 2017-S213 & 2017-S214 -- 2017 SX17, 2017 SR16, 2017 SP17, 2017 SK16, 2017 SH16, P/2017 S5
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 99942
511Haute Provence Obs. in Germany, 5 in MPECs 2017-S212 & 2017-S213 -- 2017 ST14, 2017 SS12, 2017 SQ12, 2017 SM12, P/2017 S5
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-S213 -- P/2017 S5
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2017-S207 -- 2017 SP17
K93LCO Sutherland C in South Africa, 1 in MPEC 2017-S214 -- 2017 SX17
Z17LCO Tenerife Aqawan A#2 in the Canary Islands, 2 in MPECs 2017-S207 & 2017-S212 -- 2017 SP17, 2014 VU1
W92MASTER OAFA Obs., 1 in MPEC 2017-S212 -- 2017 RV1
900Moriyama Obs. in Japan, 1 in MPEC 2017-S213 -- P/2017 S5
T03MPC code T03, 1 in MPEC 2017-S213 -- P/2017 S5
G96Mt. Lemmon Survey (MLS) in Arizona, 26 in MPECs 2017-S206, 2017-S208, 2017-S211, 2017-S212 & 2017-S214 -- 2017 SX17, 2017 SU17, 2017 ST17, 2017 SM10, 2017 SL2, 2017 SJ10, 2017 SG14, 2017 SC14, 2017 RO2, 2017 RL16, 2014 VU1, 2013 SL30, 2012 TC4, 2012 CQ36, 2012 CO46, 2004 SS, 96631, 414990, 411201, 410622, 355770, 20826, 18736, 162679, 162566, 8035
F51Pan-STARRS 1 (PS1) in Hawaii, 38 in MPECs 2017-S206, 2017-S209, 2017-S210, 2017-S212 & 2017-S214 -- 2017 SX17, 2017 SW17, 2017 SV17, 2017 ST17, 2017 SS12, 2017 SR17, 2017 SQ2, 2017 SL2, 2017 SG10, 2017 SE14, 2017 RV15, 2017 RB12, 2017 QX35, 2017 QL35, 2017 QL18, 2017 MY3, 2013 TF6, 2012 TC4, 2012 CO46, 2004 TK10, 2004 SS, 96744, 52768, 410622, 407653, 338176, 30825, 23714, 20826, 18736, 162566, 154007, 141354, 139211, 138911, 11500, 100756, 3361
B49Paus Obs. in Spain, 1 in MPEC 2017-S207 -- 2017 SP17
Z38Picoto Obs., 3 in MPEC 2017-S212 -- 68950, 190166, 7336
122Pises Obs. in France, 2 in MPEC 2017-S212 -- 496018, 338176
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-S212 -- 2017 SU17
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2017-S212 -- 2017 RV1
D29Purple Mtn. Obs. Xuyi Station in China, 17 in MPECs 2017-S212 & 2017-S213 -- 2017 SW14, P/2017 S5, 2016 AA9, 2014 CD13, 2008 MH1, 2006 KA40, 2004 TQ13, 471956, 371336, 338176, 333888, 265962, 21374, 162186, 15817, 142563, 141670
W25RMS Obs., 2 in MPECs 2017-S208 & 2017-S213 -- 2017 SU17, P/2017 S5
L04ROASTERR-1 in Romania, 1 in MPEC 2017-S213 -- P/2017 S5
A29Santa Maria a Monte Obs. in Italy, 1 in MPEC 2017-S207 -- 2017 SP17
260_Sergio Foglia & Maura Tombelli in Italy using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2017-S212 -- 2010 NG3
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-S213 -- P/2017 S5
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-S213 -- P/2017 S5
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2017-S212 & 2017-S214 -- 2017 SX17, 2017 SM14, 2017 RY15, 2014 VU1, 411201, 27031
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2017-S210 & 2017-S212 -- 2017 SW17, 2017 NK
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-S212 -- 3122
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2017-S207 & 2017-S212 -- 2017 SP17, 483422
I52Steward Obs. Mt. Lemmon Station in Arizona, 18 in MPECs 2017-S207, 2017-S208, 2017-S212 & 2017-S213 -- 2017 SZ11, 2017 SY11, 2017 SX11, 2017 SV11, 2017 SU17, 2017 SU16, 2017 SS12, 2017 SR10, 2017 SQ12, 2017 SP17, 2017 SO10, 2017 SM12, 2017 SG10, 2017 SA12, P/2017 S5, 2017 RP15, 2017 RL15, 2017 QY34
A71Stixendorf Obs. in Austria, 1 in MPEC 2017-S213 -- P/2017 S5
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-S213 -- P/2017 S5
926Tenagra II Obs. in Arizona, 4 in MPECs 2017-S207, 2017-S209, 2017-S211 & 2017-S212 -- 2017 SV17, 2017 SP17, 2017 SO10, 2014 VU1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-S212 -- 248590
J08Zonalunar Obs. in Spain, 1 in MPEC 2017-S213 -- P/2017 S5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 September '17

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
2017 SU17JPL Sentry16022069-2117302.411115e-05-6.31-6.980JPL #2 for the day: Computed at 08:43 today Pacific time based on 20 observations spanning 1.9699 days (2017-Sep-26.44444 to 2017-Sep-28.41438). Diameter approximately 0.009 km. from weighted mean H=27.91.
NEODyS15002051-2117763.76e-05-6.10-6.740NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2017-09-26.445 to 2017-09-28.415."
2017 SM14JPL Sentry15302027-210545.9442e-09-3.88-4.030JPL: Computed at 08:19 today Pacific time based on 20 observations spanning 3.9871 days (2017-Sep-23.47956 to 2017-Sep-27.46663). Diameter approximately 1.500 km. from weighted mean H=16.78.
2017 SG14JPL Sentry1602R E M O V E DJPL: Risk listing removed at 1540 UTC today.
2017 SS12JPL Sentry16022074-211366.59976e-07-7.39-7.690JPL: Computed at 08:55 today Pacific time based on 74 observations spanning 4.0242 days (2017-Sep-25.23585 to 2017-Sep-29.26007). Diameter approximately 0.013 km. from weighted mean H=27.10.
2017 SQ2JPL Sentry1500R E M O V E DJPL: Risk listing removed at 1452 UTC today.
2017 RZ17NEODyS15002019-21171341.63e-08-4.33-4.520NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2017-09-15.367 to 2017-09-16.326."
2017 RX17NEODyS15002029-2115131.77e-07-7.37-7.430NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2017-09-14.411 to 2017-09-15.372."
2017 RW17NEODyS15002044-210559.84e-09-10.18-10.30NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2017-09-14.407 to 2017-09-15.298."
2017 RV2JPL Sentry15302071-2117390.000109183083-4.93-5.750JPL: Computed at 08:04 today Pacific time based on 129 observations spanning 13.057 days (2017-Sep-14.43497 to 2017-Sep-27.49213). Diameter approximately 0.019 km. from weighted mean H=26.22.
NEODyS15002071-2117404.89e-05-5.28-5.730NEODyS: "Based on 126 optical observations (of which 10 are rejected as outliers) from 2017-09-14.436 to 2017-09-27.493."
2017 QO36NEODyS15002025-2106251.22e-09-5.95-6.330NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2017-08-31.558 to 2017-09-01.370."

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 29 September '17

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

2326Noted Radar Astrometry database update - see above
2236Grabbed MPEC 2017-S214 - 2017 SX17 - see above
1838Generated Traffic Report
1731Grabbed MPEC 2017-S213 - Comet P/2017 S5 (ATLAS) - see above
1602Noted that JPL Sentry has removed 2017 SG14 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 SS12 risk assessment - see above
Noted that JPL Sentry has updated its 2017 SU17 risk assessment - see above
1530Noted that JPL Sentry has updated its 2017 RV2 risk assessment - see above
Noted that JPL Sentry has updated its 2017 SM14 risk assessment - see above
1500Noted that NEODyS has posted 2017 QO36 as an impact risk - see above
Noted that NEODyS has updated its 2017 RV2 risk assessment - see above
Noted that NEODyS has posted 2017 RW17 as an impact risk - see above
Noted that NEODyS has posted 2017 RX17 as an impact risk - see above
Noted that NEODyS has posted 2017 RZ17 as an impact risk - see above
Noted that JPL Sentry has removed 2017 SQ2 as an impact risk - see above
Noted that NEODyS has posted 2017 SU17 as an impact risk - see above
Grabbed MPEC 2017-S212 - Daily Orbit Update - see above
0404Noted that JPL Sentry has posted 2017 SU17 as an impact risk - see above
Grabbed MPEC 2017-S211 - 2014 VU1 - see above
0331Grabbed MPEC 2017-S207 - 2017 SP17 - see above
Grabbed MPEC 2017-S208 - 2017 SU17 - see above
Grabbed MPEC 2017-S209 - 2017 SV17 - see above
Grabbed MPEC 2017-S210 - 2017 SW17 - see above
0203Grabbed MPEC 2017-S206 - 2017 ST17 - see above