Contents  on 30 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 30 August '17

Three objects reported inside ten LD

There are three asteroidal objects known to be less than ten lunar distances (LD) from Earth today. All are out around five LD, and 2017 QN1 comes its closest to our planet on this passage -- 5.47 LD at 0046 UTC.

Earth passage I D ~Size Distance Today  Notes
4.36 LD Sept. 12017 QG18 12 m  5.00 from 5.87 LD DOU
4.82 LD tomorrow2017 QQ1 37 m  5.14 from 6.31 LD DOU
5.47 LD today2017 QN1 16 m  5.47 LD Earth closest at 0046 UTC
Approaching (sorted by 10-LD bubble entry date)
2.79 LD Sept. 22017 QR32 16 m  < 10 LD tomorrow
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 2110 UTC with the discovery of already departed 2017 QM33 (MPEC), which went by the Moon at 1.52 LD on August 23rd and past us at 1.56 LD the next day. Today's DOU MPEC has first follow-up for 2017 QG18 and continuing follow-up for 2017 QQ1 and departed 2017 QW1, plus astrometry from July for 2017 MC4 and from April for radar target 2014 JO25



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.

NEOCP Activity  on 30 August '17

The MPC's NEO Confirmation Page has 46 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 46 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 63 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 30 August '17

Minor Planet Electronic Circulars

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


MPEC 2017-Q160 - "18:49 UT" - 2017 QN33


MPEC 2017-Q159 - "18:45 UT" - 2017 QM33


MPEC 2017-Q158 - "18:42 UT" - 2017 QL33


MPEC 2017-Q157 - "18:38 UT" - 2017 QK33


MPEC 2017-Q156 - "18:35 UT" - 2017 QJ33


MPEC 2017-Q155 - "18:31 UT" - 2017 QH33


MPEC 2017-Q154 - "18:27 UT" - 2017 QG33


MPEC 2017-Q153 - "18:23 UT" - 2017 QF33


MPEC 2017-Q152 - "18:04 UT" - 1998 SZ27


<< DOU on 30 Aug. '17 >>  MPEC 2017-Q151 - "12:04 UT" - Daily Orbit Update

Observers  on 30 August '17

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2017-Q151, 2017-Q154, 2017-Q157, 2017-Q158 & 2017-Q159 -- 2017 QM33, 2017 QL33, 2017 QK33, 2017 QG33, 2017 QF18, 2017 QD3, 2017 PB27, 2017 PA27, 2017 OQ68, 2017 OQ19, 494706, 222073, 190788, 142561, 11398, 7888, 2329
T05ATLAS Haleakala in Hawaii, 16 in MPEC 2017-Q151 -- 2017 QR17, 2017 QN18, 2017 PS25, 2017 MY2, 2014 YC15, 2003 QW30, 96631, 496005, 480858, 434344, 376788, 190166, 163454, 7336, 5143, 1980
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2017-Q151 -- 480858
K46Bamberg Obs. in Germany, 1 in MPEC 2017-Q151 -- 3122
309'Martin Altmann in Germany via Cerro Paranal in Chile, 2 in MPEC 2017-Q151 -- 217628, 143409
151Eschenberg Obs. in Switzerland, 4 in MPEC 2017-Q151 -- 2017 QW17, 2017 FE1, 20826, 3122
734Farpoint Obs. in Kansas, 2 in MPECs 2017-Q152 & 2017-Q159 -- 2017 QM33, 1998 SZ27
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-Q151 -- 2017 OD1
K78Iota Scorpii Obs., 3 in MPEC 2017-Q151 -- 2017 PL26, 68950, 294739
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-Q151 -- 2017 QQ1
246KLENOT in the Czech Republic, 11 in MPECs 2017-Q151, 2017-Q152 & 2017-Q160 -- 2017 QR17, 2017 QN33, 2017 PT25, 2017 PS25, 2017 OD1, 2014 YC15, 2012 FH38, 2008 MH1, 2006 KA40, 1998 SZ27, 5143
046Klet Obs. in the Czech Republic, 1 in MPEC 2017-Q151 -- 495848
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-Q159 & 2017-Q160 -- 2017 QN33, 2017 QM33
568_Marco Micheli on Mauna Kea in Hawaii, 8 in MPECs 2017-Q151, 2017-Q153, 2017-Q156 & 2017-Q157 -- 2017 QV17, 2017 QL18, 2017 QK33, 2017 QK18, 2017 QJ33, 2017 QJ18, 2017 QH18, 2017 QF33
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2017-Q151, 2017-Q158, 2017-Q159 & 2017-Q160 -- 2017 QN33, 2017 QM33, 2017 QL33, 2015 XR128, 52762, 367525
J69North Obs. in England, 1 in MPEC 2017-Q151 -- 3122
Z80Northolt Branch Obs. in England, 11 in MPEC 2017-Q151 -- 2017 PT25, 2017 PL26, 2017 NH, 2017 MC4, 2017 MB1, 2017 BM31, 2014 YC15, 2014 JO25, 496018, 265962, 142464
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-Q151 -- 2017 PT25
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2017-Q151, 2017-Q153, 2017-Q154, 2017-Q155, 2017-Q156, 2017-Q157 & 2017-Q158 -- 2017 QL33, 2017 QK33, 2017 QJ33, 2017 QH33, 2017 QG33, 2017 QF33, 2011 PT
K80Platanus Obs., 1 in MPEC 2017-Q152 -- 1998 SZ27
W98Polonia Obs. in Chile, 1 in MPEC 2017-Q151 -- 480858
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-Q151 -- 480858
W25RMS Obs., 2 in MPECs 2017-Q151 & 2017-Q160 -- 2017 QN33, 3122
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-Q152 & 2017-Q160 -- 2017 QN33, 1998 SZ27
033Schwarzschild Obs. in Germany, 2 in MPECs 2017-Q152 & 2017-Q158 -- 2017 QL33, 1998 SZ27
Y00SONEAR in Brazil, 1 in MPEC 2017-Q151 -- 3122
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2017-Q151 & 2017-Q152 -- 2017 QW1, 2017 QM18, 2017 KY34, 2014 NF3, 1998 SZ27, 496005
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2017-Q151, 2017-Q153, 2017-Q155, 2017-Q156 & 2017-Q157 -- 2017 QK33, 2017 QJ33, 2017 QH33, 2017 QF33, 2017 PR25, 2017 NK, 2017 MU8
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-Q151 -- 3122
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2017-Q151, 2017-Q158, 2017-Q159 & 2017-Q160 -- 2017 QV17, 2017 QN33, 2017 QM33, 2017 QL33, 2017 QG18, 2017 HS, 2017 HN3
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-Q151 -- 3122
Z52The Studios Obs., 3 in MPEC 2017-Q151 -- 90075, 190166, 6053
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-Q151 -- 2015 RN35
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 2 in MPECs 2017-Q155 & 2017-Q156 -- 2017 QJ33, 2017 QH33
L71Vedrus Obs. in Russia, 1 in MPEC 2017-Q151 -- 3122
K41Vegaquattro Obs. in Italy, 1 in MPEC 2017-Q151 -- 2014 YC15
C51WISE in Earth polar orbit, 1 in MPEC 2017-Q152 -- 1998 SZ27
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 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 QM33JPL Sentry21022071-2107121.08702541e-05-6.24-6.280JPL: Computed at 13:54 today Pacific time based on 24 observations spanning 2.0200 days (2017-Aug-28.30822 to 2017-Aug-30.32825). Diameter approximately 0.010 km. from weighted mean H=27.75.
2017 QU32NEODyS1604209924.28e-08-8.16-8.250NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2017-08-28.358 to 2017-08-29.301."
2017 PV26NEODyS1604204811.38e-07-4.86-4.860NEODyS: "Based on 28 optical observations (of which 3 are rejected as outliers) from 2017-08-05.568 to 2017-08-28.150."
2017 PL26NEODyS16042081-2116251.16e-06-4.93-5.090NEODyS: "Based on 181 optical observations (of which 7 are rejected as outliers) from 2017-06-21.528 to 2017-08-28.824."
JPL Sentry15152083-2116122.3535517e-06-4.60-4.860JPL: Computed at 07:57 today Pacific time based on 195 observations spanning 68.296 days (2017-Jun-21.52716 to 2017-Aug-28.82329). Diameter approximately 0.120 km. from weighted mean H=22.18.
2017 MB1JPL Sentry15152098-209811.951e-07-3.65-3.650JPL: Computed at 07:57 today Pacific time based on 433 observations spanning 35.795 days (2017-Jun-19.31418 to 2017-Jul-25.109676). Diameter approximately 0.590 km. from weighted mean H=18.81.
2015 RN35JPL Sentry15152065-2116101.19583e-05-4.25-4.480JPL: Computed at 08:03 today Pacific time based on 60 observations spanning 179.81 days (2015-Sep-09.51581 to 2016-Mar-07.32122). Diameter approximately 0.084 km. from weighted mean H=23.02.

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 30 August '17

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

2110Generated Traffic Report
2102Noted that JPL Sentry has posted 2017 QM33 as an impact risk - see above
1902Grabbed MPEC 2017-Q152 - 1998 SZ27 - see above
Grabbed MPEC 2017-Q153 - 2017 QF33 - see above
Grabbed MPEC 2017-Q154 - 2017 QG33 - see above
Grabbed MPEC 2017-Q155 - 2017 QH33 - see above
Grabbed MPEC 2017-Q156 - 2017 QJ33 - see above
Grabbed MPEC 2017-Q157 - 2017 QK33 - see above
Grabbed MPEC 2017-Q158 - 2017 QL33 - see above
Grabbed MPEC 2017-Q159 - 2017 QM33 - see above
Grabbed MPEC 2017-Q160 - 2017 QN33 - see above
1604Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
Noted that NEODyS has updated its 2017 PV26 risk assessment - see above
Noted that NEODyS has posted 2017 QU32 as an impact risk - see above
1515Noted that JPL Sentry has updated its 2015 RN35 risk assessment - see above
Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 PL26 risk assessment - see above
Grabbed MPEC 2017-Q151 - Daily Orbit Update - see above