Contents  on 23 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 23 August '17

Five objects reported inside ten LD

Five minor objects are known to be within ten lunar distances (LD) of our planet today. Nearest is risk-listed 2017 QF3, which comes its closest to Earth on this passage, reaching 1.44 LD at 2253 UTC. Among the other four objects, newly announced risk-listed 2017 QS16 is outbound from 3.67 to 4.47 LD.

Earth passage I D ~Size Distance Today  Notes
0.56 LD Aug. 202017 QN2 9 m  7.15 to 10.56 LD intruder, exits ten LD
1.44 LD today2017 QF3 8 m  1.44 LD risk, enters Earth SOI, Earth closest at 2253 UTC
2.59 LD yesterday2017 QT1 15 m  2.81 to 6.27 LD risk
3.52 LD yesterday2017 QS16 31 m  3.67 to 4.47 LD NEW, risk - MPEC
5.50 LD yesterday2017 PV25 40 m  5.52 to 5.82 LD
Approaching (sorted by 10-LD bubble entry date)
9.10 LD Aug. 252017 QJ2 21 m  < 10 LD tomorrow
5.47 LD Aug. 302017 QN1 16 m  < 10 LD Aug. 26
4.82 LD Aug. 312017 QQ1 37 m  < 10 LD Aug. 27 - DOU
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25
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 1842 UTC with the discoveries of 2017 QS16 (MPEC) and two already departed objects: 2017 QQ16 (MPEC), which passed us at 5.46 LD on August 13th, and 2017 QP16 (MPEC), which went by at 6.88 LD on August 7th. Today's DOU MPEC has first follow-up for approaching 2017 QQ1 and continuing observation of distant 2014 CU13.



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. "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 now 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 23 August '17

The MPC's NEO Confirmation Page has 57 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 57 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 76 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 23 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-Q102 - "15:05 UT" - Comet C/2017 M5 (Totas)


MPEC 2017-Q101 - "14:52 UT" - Comet C/2017 M4 (ATLAS)


MPEC 2017-Q100 - "14:45 UT" - Comet C/2017 K6 (Jacques)


MPEC 2017-Q99 - "13:59 UT" - Comet C/2017 P2 (Panstarrs)


<< DOU on 23 Aug. '17 >>  MPEC 2017-Q98 - "12:04 UT" - Daily Orbit Update


MPEC 2017-Q97 - "11:10 UT" - 2017 QS16


MPEC 2017-Q96 - "10:46 UT" - 2017 QR16


MPEC 2017-Q95 - "10:43 UT" - 2017 QQ16


MPEC 2017-Q94 - "10:40 UT" - 2017 QP16


MPEC 2017-Q93 - "10:36 UT" - 2017 QO16


MPEC 2017-Q92 - "10:33 UT" - 2017 QN16


MPEC 2017-Q91 - "10:28 UT" - 2017 OV68

Observers  on 23 August '17

A total of 54 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-Q101 -- C/2017 M4
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2017-Q91, 2017-Q96, 2017-Q98 & 2017-Q99 -- 2017 QR16, 2017 PU25, 2017 PT25, 2017 PS25, 2017 PE, C/2017 P2, 2017 OV68, 2017 OT18, 2017 NM6, 2017 MO7, 2017 MG4, 2017 HV3, 2016 UP41, 475534, 26663
T05ATLAS Haleakala in Hawaii, 8 in MPECs 2017-Q98 & 2017-Q101 -- C/2017 M4, 2008 MH1, 90075, 52762, 496018, 422699, 237805, 6053
T08ATLAS Mauna Loa in Hawaii, 7 in MPECs 2017-Q97, 2017-Q98 & 2017-Q101 -- 2017 QS16, 2017 MY3, C/2017 M4, 2015 FO124, 2014 SR339, 488494, 480858
B96Brixiis Obs. in Belgium, 1 in MPEC 2017-Q101 -- C/2017 M4
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-Q100 -- C/2017 K6
I72Carpe Noctem Obs. in Spain, 1 in MPEC 2017-Q101 -- C/2017 M4
160Castelmartini Obs. in Italy, 7 in MPEC 2017-Q98 -- 2014 YC15, 90075, 496018, 422699, 265962, 190166, 3288
107Cavezzo Obs. in Italy, 2 in MPECs 2017-Q97 & 2017-Q101 -- 2017 QS16, C/2017 M4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2017-Q92, 2017-Q93, 2017-Q94, 2017-Q95 & 2017-Q98 -- 2017 QU1, 2017 QS, 2017 QQ16, 2017 QQ1, 2017 QP16, 2017 QO16, 2017 QN16, 2017 QE2, 2017 PF, 2017 MY8
970Chelmsford Obs. in England, 1 in MPEC 2017-Q101 -- C/2017 M4
K02Eastwood Obs. in England, 1 in MPEC 2017-Q101 -- C/2017 M4
J27El Guijo Obs. in Spain, 1 in MPEC 2017-Q98 -- 2017 PL26
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2017-Q96 & 2017-Q102 -- 2017 QR16, C/2017 M5
006Fabra Obs. in Spain, 2 in MPEC 2017-Q98 -- 90075, 6053
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-Q97 -- 2017 QS16
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 1 in MPEC 2017-Q102 -- C/2017 M5
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2017-Q100 -- C/2017 K6
157Frasso Sabino Obs. in Italy, 1 in MPEC 2017-Q101 -- C/2017 M4
372Geisei Obs. in Japan, 1 in MPEC 2017-Q101 -- C/2017 M4
K88GINOP-KHK in Hungary, 2 in MPECs 2017-Q97 & 2017-Q98 -- 2017 QS16, 2017 QG3
E94Gisborne Obs. in New Zealand, 1 in MPEC 2017-Q100 -- C/2017 K6
J95Great Shefford Obs. in England, 1 in MPEC 2017-Q97 -- 2017 QS16
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-Q98 -- 416584
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q102 -- C/2017 M5
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q102 -- C/2017 M5
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q98 -- 3122
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-Q100 & 2017-Q102 -- C/2017 M5, C/2017 K6
246KLENOT in the Czech Republic, 5 in MPECs 2017-Q97 & 2017-Q98 -- 2017 QS16, 2017 QB, 2017 PT25, 2017 PS25, 2017 OD1
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-Q101 -- C/2017 M4
568_Marco Micheli on Mauna Kea in Hawaii, 6 in MPECs 2017-Q91, 2017-Q92, 2017-Q93, 2017-Q94, 2017-Q95 & 2017-Q99 -- 2017 QQ16, 2017 QP16, 2017 QO16, 2017 QN16, C/2017 P2, 2017 OV68
900Moriyama Obs. in Japan, 1 in MPEC 2017-Q101 -- C/2017 M4
Z17MPC code Z17, 1 in MPEC 2017-Q101 -- C/2017 M4
D81Nagano Obs. in Japan, 1 in MPEC 2017-Q101 -- C/2017 M4
C47Nonndorf Obs. in Austria, 2 in MPECs 2017-Q97 & 2017-Q101 -- 2017 QS16, C/2017 M4
C23Olmen Obs. in Belgium, 1 in MPEC 2017-Q101 -- C/2017 M4
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2017-Q91, 2017-Q92, 2017-Q93, 2017-Q94, 2017-Q95, 2017-Q96, 2017-Q98, 2017-Q99 & 2017-Q101 -- 2017 QR16, 2017 QQ16, 2017 QP16, 2017 QO16, 2017 QN16, C/2017 P2, 2017 OV68, C/2017 M4, 2017 CN1, 2014 CU13, 52768, 480885, 419472, 223456, 17181
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2017-Q101 -- C/2017 M4
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-Q96 & 2017-Q99 -- 2017 QR16, C/2017 P2
D29Purple Mtn. Obs. Xuyi Station in China, 16 in MPECs 2017-Q98 & 2017-Q101 -- 2017 MY3, C/2017 M4, 2013 RE21, 2009 WC52, 85839, 52762, 322763, 19764, 154007, 152770, 143404, 141874, 137799, 137199, 5143, 4197
L04ROASTERR-1 in Romania, 2 in MPECs 2017-Q97 & 2017-Q98 -- 2017 QS16, 2017 PL26
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2017-Q101 -- C/2017 M4
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-Q96 & 2017-Q97 -- 2017 QS16, 2017 QR16
C95SATINO-1 in France, 1 in MPEC 2017-Q97 -- 2017 QS16
033Schwarzschild Obs. in Germany, 4 in MPECs 2017-Q91, 2017-Q97 & 2017-Q98 -- 2017 QS16, 2017 OV68, 2017 NU6, 2017 MO7
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2017-Q101 & 2017-Q102 -- C/2017 M5, C/2017 M4
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-Q100 -- C/2017 K6
587Sormano Obs. in Italy, 1 in MPEC 2017-Q97 -- 2017 QS16
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-Q91, 2017-Q92, 2017-Q96 & 2017-Q99 -- 2017 QR16, 2017 QN16, C/2017 P2, 2017 OV68
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-Q98 -- 2329
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-Q98 -- 52762, 100926
A71Stixendorf Obs. in Austria, 1 in MPEC 2017-Q101 -- C/2017 M4
461SZTE Asteroid Program in Hungary, 1 in MPEC 2017-Q101 -- C/2017 M4
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-Q101 -- C/2017 M4
K41Vegaquattro Obs. in Italy, 1 in MPEC 2017-Q98 -- 422699
L01Visnjan Obs., 1 in MPEC 2017-Q101 -- C/2017 M4
198Wildberg Obs. in Germany, 1 in MPEC 2017-Q97 -- 2017 QS16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 QS16NEODyS18172052-206334.04e-07-6.46-6.570NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2017-08-20.427 to 2017-08-23.119."
2017 PL26NEODyS18172081-2116602.83e-05-3.57-4.050NEODyS #2 for the day: "Based on 127 optical observations (of which 5 are rejected as outliers) from 2017-08-13.402 to 2017-08-22.964."
JPL Sentry15302081-2116412.31228149e-05-3.64-4.430JPL: Computed at 07:59 today Pacific time based on 125 observations spanning 9.5626 days (2017-Aug-13.40074 to 2017-Aug-22.96336). Diameter approximately 0.120 km. from weighted mean H=22.22.

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 23 August '17

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

1842Generated Traffic Report
1817Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
Noted that NEODyS has posted 2017 QS16 as an impact risk - see above
1530Noted that JPL Sentry has updated its 2017 PL26 risk assessment - see above
Grabbed MPEC 2017-Q101 - Comet C/2017 M4 (ATLAS) - see above
Grabbed MPEC 2017-Q102 - Comet C/2017 M5 (Totas) - see above
1451Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
Grabbed MPEC 2017-Q91 - 2017 OV68 - see above
Grabbed MPEC 2017-Q92 - 2017 QN16 - see above
Grabbed MPEC 2017-Q93 - 2017 QO16 - see above
Grabbed MPEC 2017-Q94 - 2017 QP16 - see above
Grabbed MPEC 2017-Q95 - 2017 QQ16 - see above
Grabbed MPEC 2017-Q96 - 2017 QR16 - see above
Grabbed MPEC 2017-Q97 - 2017 QS16 - see above
Grabbed MPEC 2017-Q98 - Daily Orbit Update - see above
Grabbed MPEC 2017-Q99 - Comet C/2017 P2 (Panstarrs) - see above
Grabbed MPEC 2017-Q100 - Comet C/2017 K6 (Jacques) - see above