Contents  on 14 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 14 September '17

Two objects reported inside ten LD

There are two asteroidal objects known to be less than ten lunar distances (LD) from our planet today. Intruder 2017 QB35 departs from our ten-LD traffic reporting "bubble," traveling from 9.42 to 10.29 LD, as does 2017 RB, moving from 9.65 to 10.71 LD.

Earth passage I D ~Size Distance Today  Notes
0.93 LD Sept. 32017 QB35 5 m  9.42 to 10.29 LD exits ten LD, intruder
3.78 LD Sept. 62017 RB 8 m  9.65 to 10.71 LD exits ten LD
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
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 1910 UTC with follow-up for 2017 NB7 in today's DOU MPEC along with astrometry for 2016 TJ17 from last October.



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 14 September '17

The MPC's NEO Confirmation Page has 104 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 104 objects listed. Of these, 65 were "one nighters." So far The Tracking News has counted a total of 109 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 14 September '17

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 14 Sept. '17 >>  MPEC 2017-R58 - "12:03 UT" - Daily Orbit Update


MPEC 2017-R57 - "02:31 UT" - 2017 RV1


MPEC 2017-R56 - "02:18 UT" - 2017 RX1


MPEC 2017-R55 - "02:15 UT" - 2017 RW1


MPEC 2017-R54 - "02:12 UT" - 2017 RU1


MPEC 2017-R53 - "02:08 UT" - 2017 RT1

Observers  on 14 September '17

A total of 46 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-R54 -- 2017 RU1
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2017-R53 -- 2017 RT1
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2017-R57 -- 2017 RV1
T08ATLAS Mauna Loa in Hawaii, 22 in MPECs 2017-R54, 2017-R56, 2017-R57 & 2017-R58 -- 2017 RX1, 2017 RV1, 2017 RU1, 2017 PT25, 2016 AA9, 2014 YC15, 2006 KA40, 2004 TQ13, 96744, 90075, 85709, 68950, 65679, 441825, 265962, 190208, 162186, 143624, 142464, 142040, 9202, 1865
C77Bernezzo Obs. in Italy, 3 in MPECs 2017-R54, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1, 2017 RU1
073Bucharest Obs. in Romania, 2 in MPECs 2017-R57 & 2017-R58 -- 2017 RV1, 3122
Z84Calar Alto Schmidt in Spain, 2 in MPECs 2017-R55 & 2017-R56 -- 2017 RX1, 2017 RW1
160Castelmartini Obs. in Italy, 10 in MPEC 2017-R58 -- 2014 YC15, 2008 MH1, 90075, 66146, 422699, 416584, 322763, 265962, 237805, 141670
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2017-R58 -- 96744, 65679, 190208, 143624
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2017-R57 -- 2017 RV1
006Fabra Obs. in Spain, 2 in MPEC 2017-R58 -- 2014 YC15, 6053
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2017-R54, 2017-R55, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RW1, 2017 RV1, 2017 RU1
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-R56 -- 2017 RX1
C43Hoyerswerda Obs. in Germany, 3 in MPECs 2017-R54, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1, 2017 RU1
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-R57 -- 2017 RV1
I894M. Suzuki in Japan via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-R56 -- 2017 RX1
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2017-R54 -- 2017 RU1
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-R58 -- 2006 TU7
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-R58 -- 2011 PT
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-R54 -- 2017 RU1
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-R58 -- 2017 RW1
711McDonald Obs. in Texas, 3 in MPECs 2017-R54, 2017-R56 & 2017-R58 -- 2017 RX1, 2017 RV1, 2017 RU1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2017-R53 & 2017-R57 -- 2017 RV1, 2017 RT1
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2017-R58 -- 2009 SY
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-R57 -- 2017 RV1
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-R57 -- 2017 RV1
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2017-R54, 2017-R55, 2017-R57 & 2017-R58 -- 2017 RW1, 2017 RV1, 2017 RU1, 2017 QQ32, 2017 QL33, 2017 QJ18, 2017 QF17, 2017 OL1, 2015 TX143, 2014 QL390, 2011 WV134, 2008 AZ110, 482798, 480858, 253586, 162273, 143409, 137199, 7336
K63Pascoli Obs. in Italy, 2 in MPECs 2017-R55 & 2017-R56 -- 2017 RX1, 2017 RW1
B49Paus Obs. in Spain, 2 in MPECs 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1
W71Rand II Obs. in New York, 4 in MPEC 2017-R58 -- 2016 TJ17, 470510, 162269, 7341
L04ROASTERR-1 in Romania, 2 in MPECs 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1
K61Rokycany Obs. in the Czech Republic, 3 in MPECs 2017-R54, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1, 2017 RU1
V83Rolling Hills Obs. in Missouri, 1 in MPEC 2017-R58 -- 2017 OP68
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2017-R54 -- 2017 RU1
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-R54, 2017-R55, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RW1, 2017 RV1, 2017 RU1
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-R56 -- 2017 RX1
B74Santa Maria de Montmagastrell Obs. in Spain, 2 in MPECs 2017-R54 & 2017-R57 -- 2017 RV1, 2017 RU1
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-R58 -- 3122
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 3 in MPECs 2017-R54, 2017-R56 & 2017-R57 -- 2017 RX1, 2017 RV1, 2017 RU1
587Sormano Obs. in Italy, 1 in MPEC 2017-R54 -- 2017 RU1
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2017-R54, 2017-R55, 2017-R56, 2017-R57 & 2017-R58 -- 2017 RX1, 2017 RW1, 2017 RV1, 2017 RU1, 2017 RK1, 2017 QL18, 2017 NB7, 2005 UN157, 137799
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2017-R58 -- 2017 OP19, 2017 AN19, 2014 BD33
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-R58 -- 3122
I52Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPECs 2017-R53, 2017-R54, 2017-R55, 2017-R56, 2017-R57 & 2017-R58 -- 2017 RX1, 2017 RW1, 2017 RV1, 2017 RU1, 2017 RT1, 2017 QW32, 2017 QO35, 2017 PF, 2017 MQ8
K41Vegaquattro Obs. in Italy, 1 in MPEC 2017-R56 -- 2017 RX1
C51WISE in Earth polar orbit, 1 in MPEC 2017-R58 -- 2017 HY50
J08Zonalunar Obs. in Spain, 1 in MPEC 2017-R57 -- 2017 RV1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 September '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2323 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
2008 EM68JPL Sentry18212018-211611101.35374692e-05-5.13-5.470JPL: Computed at 00:27 April 7th Pacific time based on 12 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183). Diameter approximately 0.010 km. from weighted mean H=27.72.

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 14 September '17

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

1910Generated Traffic Report
1821Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above
1530Grabbed MPEC 2017-R58 - Daily Orbit Update - see above
0409Grabbed MPEC 2017-R53 - 2017 RT1 - see above
Grabbed MPEC 2017-R54 - 2017 RU1 - see above
Grabbed MPEC 2017-R55 - 2017 RW1 - see above
Grabbed MPEC 2017-R56 - 2017 RX1 - see above
Grabbed MPEC 2017-R57 - 2017 RV1 - see above