Contents  on 2 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 2 September '17

Five objects reported inside ten LD

Five asteroids are reported inside ten lunar distances (LD) of our home world today. Closest is intruder 2017 QB35, which comes within one LD of both Earth and Moon.

Earth passage I D ~Size Distance Today  Notes
0.93 LD tomorrow2017 QB35 5 m  0.98 from 1.53 LD inside Earth SOI, intruder today - DOU
2.79 LD today2017 QR32 16 m  2.79 LD Earth closest at 1326 UTC
4.36 LD yesterday2017 QG18 12 m  4.39 to 4.79 LD
4.82 LD Aug. 312017 QQ1 37 m  5.55 to 6.97 LD
5.47 LD Aug. 302017 QN1 16 m  8.90 to 10.87 LD exits ten LD
Approaching (sorted by 10-LD bubble entry date)
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 1632 UTC with first follow-up for 2017 QB35 in today's DOU MPEC.



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 2 September '17

The MPC's NEO Confirmation Page has 62 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 62 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 91 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 2 September '17

Minor Planet Electronic Circulars

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


MPEC 2017-R25 - "22:37 UT" - 2017 RC


MPEC 2017-R24 - "22:34 UT" - 2017 RB


MPEC 2017-R23 - "22:31 UT" - 2017 QV35


MPEC 2017-R22 - "22:27 UT" - 2017 QU35


MPEC 2017-R21 - "22:24 UT" - 2017 QT35


MPEC 2017-R20 - "22:21 UT" - 2017 QS35


MPEC 2017-R19 - "22:17 UT" - 2017 QR35


MPEC 2017-R18 - "22:15 UT" - 2017 QQ35


MPEC 2017-R17 - "22:11 UT" - 2017 QP35


MPEC 2017-R16 - "22:08 UT" - 2017 QO35


MPEC 2017-R15 - "22:01 UT" - 2017 QN35


MPEC 2017-R14 - "21:57 UT" - 2017 QM35


MPEC 2017-R13 - "21:54 UT" - 2017 QL35


<< DOU on 2 Sept. '17 >>  MPEC 2017-R12 - "12:03 UT" - Daily Orbit Update

Observers  on 2 September '17

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-R19 -- 2017 QR35
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2017-R12, 2017-R13, 2017-R18, 2017-R20, 2017-R21, 2017-R22, 2017-R23, 2017-R24 & 2017-R25 -- 2017 RC, 2017 RB, 2017 QV35, 2017 QU35, 2017 QT35, 2017 QS35, 2017 QQ35, 2017 QL35, 2017 PE, 2017 OT18, 2017 OL1, 2017 OH68, 2017 OG1, 2017 OD1, 2017 OC, 2017 NM6, 2017 MV2, 2017 HR3, 2016 UP41, 2015 JD2, 2013 JY35, 494713, 222165
T05ATLAS Haleakala in Hawaii, 15 in MPECs 2017-R12 & 2017-R18 -- 2017 QQ35, 2017 PJ26, 2017 OD1, 2017 MY3, 2017 GQ6, 2017 FQ64, 2014 UA192, 2012 FH38, 89355, 66008, 385580, 265196, 25330, 141874, 137799
T08ATLAS Mauna Loa in Hawaii, 11 in MPECs 2017-R12 & 2017-R19 -- 2017 QY34, 2017 QR35, 2014 YC15, 2006 KA40, 494975, 333888, 326388, 265962, 142464, 142040, 11500
I72Carpe Noctem Obs. in Spain, 1 in MPEC 2017-R12 -- 3122
160Castelmartini Obs. in Italy, 11 in MPECs 2017-R12 & 2017-R19 -- 2017 QR35, 2014 YC15, 96631, 90075, 496018, 416584, 265962, 190166, 7336, 5143, 3288
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPEC 2017-R12 -- 2017 QS, 2017 QO32, 2017 QN16, 2017 QD17, 2017 PK26, 2017 OQ19, 2017 NQ6, 2017 KO4, 2017 HW48
U82CS3 Palmer Divide Station in southern California, 1 in MPEC 2017-R12 -- 3122
Z40El Manzanillo Obs., 1 in MPEC 2017-R12 -- 3122
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-R19 -- 2017 QR35
K50Feuerstein Obs. in Germany, 1 in MPEC 2017-R12 -- 3122
K88GINOP-KHK in Hungary, 2 in MPECs 2017-R13 & 2017-R19 -- 2017 QR35, 2017 QL35
J95Great Shefford Obs. in England, 3 in MPECs 2017-R12, 2017-R13 & 2017-R19 -- 2017 QR35, 2017 QL35, 2017 QB35
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-R12 -- 190208
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-R18 -- 2017 QQ35
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-R19 -- 2017 QR35
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-R12 & 2017-R19 -- 2017 QR35, 3122
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2017-R13 & 2017-R21 -- 2017 QT35, 2017 QL35
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2017-R12 -- 2014 YY8, 2012 TV78, 2005 UT64
Z43Landehen Obs., 5 in MPEC 2017-R12 -- 90075, 422699, 265962, 190166, 6053
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2017-R13, 2017-R14, 2017-R15, 2017-R16, 2017-R17, 2017-R18, 2017-R21, 2017-R24 & 2017-R25 -- 2017 RC, 2017 RB, 2017 QT35, 2017 QQ35, 2017 QP35, 2017 QO35, 2017 QN35, 2017 QM35, 2017 QL35
900Moriyama Obs. in Japan, 1 in MPEC 2017-R19 -- 2017 QR35
G96Mt. Lemmon Survey (MLS) in Arizona, 21 in MPECs 2017-R12, 2017-R13, 2017-R14, 2017-R15, 2017-R16, 2017-R17, 2017-R21, 2017-R24 & 2017-R25 -- 2017 RC, 2017 RB, 2017 QT35, 2017 QS32, 2017 QP35, 2017 QO35, 2017 QN35, 2017 QM35, 2017 QL35, 2017 OJ19, 2017 OG1, 2014 NF63, 2014 NE64, 2009 BF, 90075, 163454, 162186, 154007, 152770, 100756, 5143
J15Muxagata Obs., 1 in MPEC 2017-R12 -- 3122
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-R12 -- 3122
C23Olmen Obs. in Belgium, 1 in MPEC 2017-R12 -- 3122
X14Orbis Tertius Obs. in Argentina, 1 in MPEC 2017-R12 -- 3122
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2017-R12, 2017-R18, 2017-R20, 2017-R22 & 2017-R23 -- 2017 QV35, 2017 QU35, 2017 QS35, 2017 QQ35, 2017 QP33, 2017 PU25, 2016 AA9, 2012 PN28, 2010 MR87, 2008 MH1, 1999 AF4, 90075, 88188, 456651, 435302, 420302, 333908, 31221, 285263, 26663, 210012, 162186, 162011, 159399, 142348, 101955
K63Pascoli Obs. in Italy, 1 in MPEC 2017-R12 -- 3122
Z38Picoto Obs., 1 in MPEC 2017-R12 -- 3122
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-R12, 2017-R19, 2017-R24 & 2017-R25 -- 2017 RC, 2017 RB, 2017 QR35, 2017 QA35
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-R18 -- 2017 QQ35
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-R13 -- 2017 QL35
K14Sencelles Obs. in Spain, 1 in MPEC 2017-R12 -- 3122
Y00SONEAR in Brazil, 2 in MPECs 2017-R12 & 2017-R19 -- 2017 QR35, 137799
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-R21 -- 2017 QT35
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-R18, 2017-R20, 2017-R22 & 2017-R23 -- 2017 QV35, 2017 QU35, 2017 QS35, 2017 QQ35
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2017-R13, 2017-R14 & 2017-R15 -- 2017 QN35, 2017 QM35, 2017 QL35
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-R12 -- 2015 RN35
C51WISE in Earth polar orbit, 2 in MPEC 2017-R12 -- 456651, 322763
Z57Zuben Obs., 1 in MPEC 2017-R12 -- 3122
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 September '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2325 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
2015 RN35JPL Sentry15202092-211453.97553e-07-5.92-6.240JPL: Computed at 08:04 today Pacific time based on 68 observations spanning 187.93 days (2015-Sep-09.51581 to 2016-Mar-15.441186). Diameter approximately 0.082 km. from weighted mean H=23.07.

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 2 September '17

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

2247Grabbed MPEC 2017-R15 - 2017 QN35 - see above
Grabbed MPEC 2017-R16 - 2017 QO35 - see above
Grabbed MPEC 2017-R17 - 2017 QP35 - see above
Grabbed MPEC 2017-R18 - 2017 QQ35 - see above
Grabbed MPEC 2017-R19 - 2017 QR35 - see above
Grabbed MPEC 2017-R20 - 2017 QS35 - see above
Grabbed MPEC 2017-R21 - 2017 QT35 - see above
Grabbed MPEC 2017-R22 - 2017 QU35 - see above
Grabbed MPEC 2017-R23 - 2017 QV35 - see above
Grabbed MPEC 2017-R24 - 2017 RB - see above
Grabbed MPEC 2017-R25 - 2017 RC - see above
2200Grabbed MPEC 2017-R13 - 2017 QL35 - see above
Grabbed MPEC 2017-R14 - 2017 QM35 - see above
1632Generated Traffic Report
1520Noted that JPL Sentry has updated its 2015 RN35 risk assessment - see above
Grabbed MPEC 2017-R12 - Daily Orbit Update - see above