Contents  on 17 August '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 17 August '17

Two objects reported inside ten LD

There are two asteroidal objects known to be within ten lunar distances (LD) of our home world today. 2017 PV25 is inbound from 9.92 to 8.74 LD and 2017 PD25 leaves the ten LD space, moving out from 9.73 to 10.16 LD.

Earth passage I D ~Size Distance Today  Notes
5.50 LD Aug. 222017 PV25 40 m  8.74 from 9.92 LD DOU
9.62 LD yesterday2017 PD25 30 m  9.73 to 10.16 LD exits ten LD - DOU
Approaching (sorted by 10-LD bubble entry date)
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25 - DOU
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, intruder, radar/NHATS target, risk
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

This report was generated at 1716 UTC with first follow-up for 2017 PV25 in today's DOU MPEC along with continuing follow-up for 2017 PD25 and 1989 VB.



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 17 August '17

The MPC's NEO Confirmation Page has 82 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 82 objects listed. Of these, 34 were "one nighters." So far The Tracking News has counted a total of 105 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 17 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-Q22 - "17:48 UT" - 2017 QB


MPEC 2017-Q21 - "17:44 UT" - 2017 QA


MPEC 2017-Q20 - "17:41 UT" - 2017 PO26


MPEC 2017-Q19 - "17:38 UT" - 2017 PN26


MPEC 2017-Q18 - "17:35 UT" - 2017 PM26


MPEC 2017-Q17 - "17:32 UT" - 2017 PL26


MPEC 2017-Q16 - "17:28 UT" - 2017 PK26


MPEC 2017-Q15 - "17:25 UT" - 2017 PJ26


MPEC 2017-Q14 - "17:22 UT" - 2017 OT68


MPEC 2017-Q13 - "17:19 UT" - 2017 OS68


MPEC 2017-Q12 - "13:20 UT" - Comet P/2017 P1 (Panstarrs)


<< DOU on 17 Aug. '17 >>  MPEC 2017-Q11 - "12:04 UT" - Daily Orbit Update

Observers  on 17 August '17

A total of 44 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-Q15 -- 2017 PJ26
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2017-Q11, 2017-Q13, 2017-Q14 & 2017-Q17 -- 2017 PR25, 2017 PL26, 2017 OX67, 2017 OW18, 2017 OT68, 2017 OS68, 2017 MD4, 2017 LW, 2017 KT34, 2017 FH101, 2017 DQ15, 2012 HN13, 2008 MH1, 2005 EJ94, 2004 QD20, 96631, 90075, 68950, 374449, 190166, 141670, 11398, 7336, 6053, 2329, 1980
T05ATLAS Haleakala in Hawaii, 18 in MPECs 2017-Q11, 2017-Q17 & 2017-Q22 -- 2017 QB, 2017 PS25, 2017 PL26, 2017 GQ6, 2015 FO124, 2014 UA192, 2014 SR339, 1989 VB, 488494, 485652, 385580, 341816, 265196, 242211, 232368, 159467, 137799, 3752
T08ATLAS Mauna Loa in Hawaii, 15 in MPEC 2017-Q11 -- 2017 PD25, 2017 NL6, 2008 MH1, 2006 KA40, 90075, 495848, 422699, 416584, 367525, 162186, 142464, 142040, 136818, 6053, 2329
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-Q17 -- 2017 PL26
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-Q22 -- 2017 QB
160Castelmartini Obs. in Italy, 13 in MPECs 2017-Q11 & 2017-Q17 -- 2017 PL26, 2017 PD25, 2014 YC15, 2008 MH1, 96631, 90075, 66146, 53319, 416584, 322763, 237805, 141670, 6053
107Cavezzo Obs. in Italy, 1 in MPEC 2017-Q17 -- 2017 PL26
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2017-Q16, 2017-Q18, 2017-Q19, 2017-Q20 & 2017-Q21 -- 2017 QA, 2017 PO26, 2017 PN26, 2017 PM26, 2017 PK26
006Fabra Obs. in Spain, 2 in MPEC 2017-Q11 -- 90075, 6053
734Farpoint Obs. in Kansas, 2 in MPECs 2017-Q11 & 2017-Q22 -- 2017 QB, 2017 PV25
E94Gisborne Obs. in New Zealand, 1 in MPEC 2017-Q15 -- 2017 PJ26
J95Great Shefford Obs. in England, 2 in MPECs 2017-Q11 & 2017-Q17 -- 2017 PY24, 2017 PL26
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-Q22 -- 2017 QB
K78Iota Scorpii Obs., 1 in MPEC 2017-Q11 -- 68950
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q17 -- 2017 PL26
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q12 -- P/2017 P1
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 4 in MPECs 2017-Q11, 2017-Q15 & 2017-Q17 -- 2017 PL26, 2017 PJ26, 2017 FQ64, 1989 VB
W85LCOGT Cerro Tololo A in Chile, 2 in MPECs 2017-Q12 & 2017-Q19 -- 2017 PN26, P/2017 P1
W89LCOGT Cerro Tololo Aqawan A#1 in Chile, 1 in MPEC 2017-Q11 -- 3122
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-Q16 -- 2017 PK26
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-Q18 -- 2017 PM26
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2017-Q17, 2017-Q19 & 2017-Q20 -- 2017 PO26, 2017 PN26, 2017 PL26
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-Q12, 2017-Q14 & 2017-Q20 -- 2017 PO26, P/2017 P1, 2017 OT68
108Montelupo Obs. in Italy, 4 in MPEC 2017-Q11 -- 2014 YC15, 90075, 190166, 6053
900Moriyama Obs. in Japan, 2 in MPECs 2017-Q17 & 2017-Q22 -- 2017 QB, 2017 PL26
C47Nonndorf Obs. in Austria, 2 in MPECs 2017-Q11 & 2017-Q17 -- 2017 PV25, 2017 PL26
J69North Obs. in England, 1 in MPEC 2017-Q17 -- 2017 PL26
G34Oberfrauendorf Obs. in Germany, 2 in MPECs 2017-Q11 & 2017-Q17 -- 2017 PL26, 2014 YC15
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-Q11 -- 142561
F51Pan-STARRS 1 (PS1) in Hawaii, 30 in MPECs 2017-Q11, 2017-Q12, 2017-Q13, 2017-Q14, 2017-Q15, 2017-Q16, 2017-Q18, 2017-Q19, 2017-Q20 & 2017-Q21 -- 2017 QA, 2017 PV25, 2017 PQ24, 2017 PO26, 2017 PN26, 2017 PM26, 2017 PK26, 2017 PJ26, P/2017 P1, 2017 OY67, 2017 OT68, 2017 OS68, 2017 OK19, 2017 GQ6, 2013 RE21, 2007 TG15, 2002 RP28, 496124, 485652, 415267, 399446, 374449, 25330, 20826, 18736, 163454, 163250, 162913, 162566, 138859
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-Q17 -- 2017 PL26
K80Platanus Obs., 2 in MPECs 2017-Q11 & 2017-Q17 -- 2017 PV25, 2017 PL26
L04ROASTERR-1 in Romania, 1 in MPEC 2017-Q17 -- 2017 PL26
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2017-Q17 -- 2017 PL26
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-Q17 -- 2017 PL26
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-Q17 -- 2017 PL26
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-Q17 -- 2017 PL26
033Schwarzschild Obs. in Germany, 1 in MPEC 2017-Q17 -- 2017 PL26
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2017-Q11, 2017-Q13 & 2017-Q14 -- 2017 PS24, 2017 OT68, 2017 OS68, 2016 UP41, 2013 XN24, 2009 EO2, 2007 RM133
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-Q17 -- 2017 PL26
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-Q11 -- 2015 AC44
L01Visnjan Obs., 2 in MPECs 2017-Q17 & 2017-Q22 -- 2017 QB, 2017 PL26
Q65Warrumbungle Obs. in New South Wales, 1 in MPEC 2017-Q11 -- 3122
C51WISE in Earth polar orbit, 1 in MPEC 2017-Q11 -- 2017 LU
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2017-Q11 -- 456651, 12538, 2329, 1980
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 August '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 PL26JPL Sentry19342081-2116782.73146162e-05-3.57-4.450JPL: Computed at 12:01 today Pacific time based on 80 observations spanning 4.2395 days (2017-Aug-13.40074 to 2017-Aug-17.64025). Diameter approximately 0.120 km. from weighted mean H=22.20.

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 17 August '17

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

1934Noted that JPL Sentry has posted 2017 PL26 as an impact risk - see above
1845Grabbed MPEC 2017-Q17 - 2017 PL26 - see above
Grabbed MPEC 2017-Q18 - 2017 PM26 - see above
Grabbed MPEC 2017-Q19 - 2017 PN26 - see above
Grabbed MPEC 2017-Q20 - 2017 PO26 - see above
Grabbed MPEC 2017-Q21 - 2017 QA - see above
Grabbed MPEC 2017-Q22 - 2017 QB - see above
1730Grabbed MPEC 2017-Q13 - 2017 OS68 - see above
Grabbed MPEC 2017-Q14 - 2017 OT68 - see above
Grabbed MPEC 2017-Q15 - 2017 PJ26 - see above
Grabbed MPEC 2017-Q16 - 2017 PK26 - see above
1716Generated Traffic Report
1441Grabbed MPEC 2017-Q11 - Daily Orbit Update - see above
Grabbed MPEC 2017-Q12 - Comet P/2017 P1 (Panstarrs) - see above