Contents  on 1 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 1 September '17

Five objects reported inside ten LD

Today there are five known transient natural objects traveling less than ten lunar distances (LD) from Earth. Nearest of these is newly announced intruder 2017 QB35, already within our planet's SOI, inbound from 2.30 to 1.53 LD.

Earth passage I D ~Size Distance Today  Notes
0.93 LD Sept. 32017 QB35 5 m  1.53 from 2.30 LD NEW, intruder, inside Earth SOI - MPEC
2.79 LD tomorrow2017 QR32 16 m  3.59 from 6.91 LD
4.36 LD today2017 QG18 12 m  4.36 LD Earth closest at 1547 UTC
4.82 LD Aug. 312017 QQ1 37 m  4.84 to 5.55 LD
5.47 LD Aug. 302017 QN1 16 m  7.18 to 8.90 LD
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 1725 UTC with the discoveries of 2017 QB35 (MPEC) and two already departed objects: risk-listed 2017 QU34 (MPEC), which flew past us at 2.77 LD on August 25th, and 2017 QT34 (MPEC), which went by at 2.59 LD back on August 7th. Today's DOU MPEC has follow-up for approaching 1989 VB and distant 2014 CU13 along with new observations from April of then 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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports ten-plus years ago 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 1 September '17

The MPC's NEO Confirmation Page has 71 listings

When last checked at 1747 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 71 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 82 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 1 September '17

Minor Planet Electronic Circulars

As of last check at 1747 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-R11 - "14:18 UT" - 2017 QB35


MPEC 2017-R10 - "14:14 UT" - 2017 QA35


MPEC 2017-R09 - "14:03 UT" - 2017 QZ34


MPEC 2017-R08 - "13:58 UT" - 2017 QY34


MPEC 2017-R07 - "13:55 UT" - 2017 QX34


MPEC 2017-R06 - "13:51 UT" - 2017 QW34


<< DOU on 1 Sept. '17 >>  MPEC 2017-R05 - "12:03 UT" - Daily Orbit Update


MPEC 2017-R04 - "02:56 UT" - 2017 OY68


MPEC 2017-R03 - "02:53 UT" - 2017 QV34


MPEC 2017-R02 - "02:50 UT" - 2017 QU34


MPEC 2017-R01 - "02:47 UT" - 2017 QT34

Observers  on 1 September '17

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
K82Alphard Obs., 1 in MPEC 2017-R05 -- 3122
X39Antares Obs., 1 in MPEC 2017-R05 -- 3122
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPEC 2017-R05 -- 2017 PT25, 2017 PS25, 2017 OT18, 2017 OG68, 2017 OC, 2017 MO7, 2017 KT34, 2017 KR34, 2017 FE1, 2016 UP41, 2015 UK52, 2015 SO2, 2004 TK10, 374188, 354101, 310402, 139211
T05ATLAS Haleakala in Hawaii, 8 in MPECs 2017-R03, 2017-R05 & 2017-R08 -- 2017 QY34, 2017 QV34, 68950, 456651, 422699, 294739, 153415, 6053
T08ATLAS Mauna Loa in Hawaii, 9 in MPEC 2017-R05 -- 2017 QR17, 2017 PS25, 2014 YC15, 96631, 190166, 152770, 5786, 5143, 3288
I72Carpe Noctem Obs. in Spain, 1 in MPEC 2017-R05 -- 3122
160Castelmartini Obs. in Italy, 3 in MPEC 2017-R05 -- 142040, 12538, 1980
822Cordoba Obs. in Argentina, 1 in MPEC 2017-R05 -- 3122
734Farpoint Obs. in Kansas, 3 in MPECs 2017-R02, 2017-R04 & 2017-R10 -- 2017 QU34, 2017 QA35, 2017 OY68
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2017-R03, 2017-R05 & 2017-R08 -- 2017 QY34, 2017 QV34, 3122
K88GINOP-KHK in Hungary, 2 in MPECs 2017-R03 & 2017-R08 -- 2017 QY34, 2017 QV34
J95Great Shefford Obs. in England, 5 in MPECs 2017-R03, 2017-R08, 2017-R09, 2017-R10 & 2017-R11 -- 2017 QZ34, 2017 QY34, 2017 QV34, 2017 QB35, 2017 QA35
B34Green Island Obs. in Cyprus, 1 in MPEC 2017-R05 -- 3122
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-R08 -- 2017 QY34
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2017-R03, 2017-R05 & 2017-R08 -- 2017 QY34, 2017 QV34, 2017 OP68
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 3 in MPECs 2017-R03, 2017-R05 & 2017-R08 -- 2017 QY34, 2017 QV34, 237805
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2017-R02, 2017-R08, 2017-R09, 2017-R10 & 2017-R11 -- 2017 QZ34, 2017 QY34, 2017 QU34, 2017 QB35, 2017 QA35
K95MASTER-II Sutherland in South Africa, 3 in MPEC 2017-R05 -- 2004 AH, 90075, 154347
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-R01, 2017-R06 & 2017-R07 -- 2017 QX34, 2017 QW34, 2017 QT34
213Montcabre Obs. in Spain, 1 in MPEC 2017-R05 -- 3122
900Moriyama Obs. in Japan, 1 in MPEC 2017-R08 -- 2017 QY34
G96Mt. Lemmon Survey (MLS) in Arizona, 24 in MPECs 2017-R02, 2017-R03, 2017-R05, 2017-R08, 2017-R09, 2017-R10 & 2017-R11 -- 2017 QZ34, 2017 QY34, 2017 QV34, 2017 QU34, 2017 QS17, 2017 QB35, 2017 QA35, 2017 MY2, 2016 AA9, 2014 YC15, 2004 QD20, 415715, 376788, 339492, 338176, 333908, 285263, 265962, 16960, 163454, 153415, 143409, 141851, 9202
J69North Obs. in England, 1 in MPEC 2017-R08 -- 2017 QY34
F51Pan-STARRS 1 (PS1) in Hawaii, 31 in MPECs 2017-R01, 2017-R03, 2017-R05, 2017-R06, 2017-R07 & 2017-R08 -- 2017 QY34, 2017 QX34, 2017 QW34, 2017 QV34, 2017 QT34, 2017 QS17, 2017 QO2, 2017 QF2, 2017 OQ68, 2017 OH68, 2017 FE1, 2016 AA9, 2014 CU13, 2011 EB7, 2004 TQ13, 1993 RA, 1989 UP, 96631, 90075, 52768, 52762, 470310, 411201, 333480, 286080, 23187, 223456, 17188, 162186, 9950, 2201
K63Pascoli Obs. in Italy, 1 in MPEC 2017-R05 -- 3122
L18QOS Obs., 2 in MPEC 2017-R05 -- 2014 JO25, 3122
L04ROASTERR-1 in Romania, 3 in MPECs 2017-R03, 2017-R05 & 2017-R08 -- 2017 QY34, 2017 QV34, 3122
V83Rolling Hills Obs. in Missouri, 1 in MPEC 2017-R05 -- 3122
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-R03 & 2017-R08 -- 2017 QY34, 2017 QV34
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-R05 -- 3122
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-R05 -- 3122
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-R05 -- 1989 VB
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2017-R03, 2017-R04 & 2017-R05 -- 2017 QV34, 2017 PS25, 2017 PR25, 2017 PB27, 2017 PA27, 2017 OY68, 2017 MY3, 2017 MO7
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2017-R04, 2017-R05, 2017-R07, 2017-R08 & 2017-R09 -- 2017 QZ34, 2017 QY34, 2017 QX34, 2017 QD3, 2017 PR25, 2017 OY68, 2012 BB124
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPECs 2017-R03, 2017-R08, 2017-R09 & 2017-R10 -- 2017 QZ34, 2017 QY34, 2017 QV34, 2017 QA35
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-R05 -- 2015 RN35
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 2 in MPECs 2017-R04 & 2017-R07 -- 2017 QX34, 2017 OY68
C51WISE in Earth polar orbit, 4 in MPECs 2017-R04 & 2017-R05 -- 2017 OY68, 53319, 456651, 322763
N87Xinjiang Obs. Nanshan Station in China, 1 in MPEC 2017-R05 -- 2017 NL6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 September '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 1747 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 QU34NEODyS15402083-2111111.09e-05-6.61-6.870NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2017-08-28.310 to 2017-08-31.358."
JPL Sentry04532083-2111101.248789e-05-6.55-6.780JPL: Computed at 21:51 Aug. 31st Pacific time based on 23 observations spanning 3.0484 days (2017-Aug-28.30888 to 2017-Aug-31.357263). Diameter approximately 0.007 km. from weighted mean H=28.28.
2017 QM33NEODyS15402069-2107189.3e-06-6.31-6.380NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2017-08-28.309 to 2017-08-30.329."
2017 QU32NEODyS1540R E M O V E D-
2017 PV26NEODyS1540204818.77e-08-5.07-5.070NEODyS: "Based on 31 optical observations (of which 3 are rejected as outliers) from 2017-08-05.568 to 2017-08-30.778."
2017 PL26NEODyS15402081-2115251.33e-06-4.85-4.970NEODyS: "Based on 198 optical observations (of which 9 are rejected as outliers) from 2017-06-21.528 to 2017-08-28.824."
2017 MB1NEODyS1540209815.38e-08-4.21-4.210NEODyS: "Based on 437 optical observations (of which 13 are rejected as outliers) from 2017-06-19.315 to 2017-07-25.110."
2015 RN35JPL Sentry15402074-211482.563634e-06-5.01-5.350JPL: Computed at 08:02 today Pacific time based on 66 observations spanning 179.81 days (2015-Sep-09.51581 to 2016-Mar-07.32122). Diameter approximately 0.083 km. from weighted mean H=23.05.
NEODyS15402074-211483.4e-06-4.87-5.40NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2015-09-09.517 to 2016-03-07.322."

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 1 September '17

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

1725Generated Traffic Report
1540Noted that JPL Sentry has updated its 2015 RN35 risk assessment - see above
Noted that NEODyS has updated its 2015 RN35 risk assessment - see above
Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
Noted 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 QM33 as an impact risk - see above
Noted that NEODyS has removed 2017 QU32 as an impact risk - see above
Noted that NEODyS has posted 2017 QU34 as an impact risk - see above
Grabbed MPEC 2017-R05 - Daily Orbit Update - see above
Grabbed MPEC 2017-R06 - 2017 QW34 - see above
Grabbed MPEC 2017-R07 - 2017 QX34 - see above
Grabbed MPEC 2017-R08 - 2017 QY34 - see above
Grabbed MPEC 2017-R09 - 2017 QZ34 - see above
Grabbed MPEC 2017-R10 - 2017 QA35 - see above
Grabbed MPEC 2017-R11 - 2017 QB35 - see above
0453Noted that JPL Sentry has posted 2017 QU34 as an impact risk - see above
0312Grabbed MPEC 2017-R01 - 2017 QT34 - see above
Grabbed MPEC 2017-R02 - 2017 QU34 - see above
Grabbed MPEC 2017-R03 - 2017 QV34 - see above
Grabbed MPEC 2017-R04 - 2017 OY68 - see above