Contents  on 16 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 16 September '17

No objects reported inside ten LD

No asteroids are known to be moving within ten lunar distances (LD) of Earth today, but a swollen NEOCP list could soon change that.

Approaching (sorted by 10-LD bubble entry date)
7.87 LD Sept. 291989 VB 389 m  < 10 LD Sept. 25, radar target
0.13 LD Oct. 122012 TC4 15 m  < 10 LD Oct. 5, intruder, radar/NHATS target, risk - DOU
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 1810 UTC with follow-up in today's DOU MPEC for approaching 2012 TC4.



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 16 September '17

The MPC's NEO Confirmation Page has 147 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 147 objects listed. Of these, 65 were "one nighters." So far The Tracking News has counted a total of 152 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 16 September '17

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 16 Sept. '17 >>  MPEC 2017-S01 - "12:03 UT" - Daily Orbit Update

Observers  on 16 September '17

A total of 31 observers appear in today's MPEC.

CodeObserver / observatory
C97Al-Fulaij Obs., 9 in MPEC 2017-S01 -- 90075, 68950, 496018, 495848, 441825, 142040, 7336, 6053, 3122
X39Antares Obs., 1 in MPEC 2017-S01 -- 3122
T05ATLAS Haleakala in Hawaii, 18 in MPEC 2017-S01 -- 2017 RW1, 2017 RV1, 2017 RU1, 2017 PS30, 2017 MY3, 1998 SB15, 25330, 242211, 223456, 159467, 142561, 141874, 138911, 137799, 6050, 5786, 5143, 3288
T08ATLAS Mauna Loa in Hawaii, 13 in MPEC 2017-S01 -- 2017 QO17, 2017 PS30, 2017 OD1, 2014 UA192, 1998 SZ27, 66008, 374038, 25330, 21374, 142561, 141874, 137799, 137199
073Bucharest Obs. in Romania, 2 in MPEC 2017-S01 -- 2017 RV1, 6053
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-S01 -- 3200
160Castelmartini Obs. in Italy, 1 in MPEC 2017-S01 -- 3122
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-S01 -- 496018
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2017-S01 -- 2017 QR17, 2017 QO17, 2017 QN18, 2017 QH18, 2017 NQ6, 2017 MU7, 2017 BM31
J27El Guijo Obs. in Spain, 1 in MPEC 2017-S01 -- 2017 PJ26
W46Foxfire Village Obs., 1 in MPEC 2017-S01 -- 3122
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-S01 -- 142464
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-S01 -- 2017 PY24
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-S01 -- 2015 FO124
Z43Landehen Obs., 1 in MPEC 2017-S01 -- 3122
Z87Laver Obs. in England, 1 in MPEC 2017-S01 -- 90075
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-S01 -- 2000 YG29
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-S01 -- 85804
J15Muxagata Obs., 1 in MPEC 2017-S01 -- 3122
J69North Obs. in England, 1 in MPEC 2017-S01 -- 3122
C27Pallerols Obs. in Spain, 1 in MPEC 2017-S01 -- 3122
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPEC 2017-S01 -- 2017 OQ68, 2017 MU7, 2017 FQ64, 427499, 385580, 371336, 355770, 223456, 170013, 162195, 137427, 137199, 5786
Z38Picoto Obs., 1 in MPEC 2017-S01 -- 3122
Z47Runcorn Obs., 1 in MPEC 2017-S01 -- 3122
Y00SONEAR in Brazil, 1 in MPEC 2017-S01 -- 341816
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2017-S01 -- 2017 QW17, 2017 KS31, 2017 HH, 2014 QL390, 2012 TK123, 1998 SZ27, 1989 UP
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2017-S01 -- 2017 RK1, 2006 YY2, 2004 QF1
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPEC 2017-S01 -- 2017 QY34, 2017 QP17
H32Texas A&M Physics Obs. in Texas, 1 in MPEC 2017-S01 -- 3122
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2017-S01 -- 2012 TC4
I15Wishing Star Obs. in Rhode Island, 6 in MPEC 2017-S01 -- 2017 RV1, 2017 PR25, 496005, 495848, 153415, 3122
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 September '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 RCNEODyS15402066-2117553.99e-05-6.13-6.540NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2017-09-01.386 to 2017-09-13.415."
2017 PL26NEODyS15402081-2116304.22e-06-4.33-4.530NEODyS: "Based on 208 optical observations (of which 9 are rejected as outliers) from 2017-06-21.528 to 2017-08-28.824."
2012 TC4NEODyS15402050-2112792.39e-03-3.53-3.60NEODyS: "Based on 274 optical observations (of which 1 are rejected as outliers) from 2012-10-04.468 to 2017-09-14.447."

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 16 September '17

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

1810Generated Traffic Report
1540Noted that NEODyS has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has updated its 2017 PL26 risk assessment - see above
Noted that NEODyS has updated its 2017 RC risk assessment - see above
Grabbed MPEC 2017-S01 - Daily Orbit Update - see above