Contents  on 24 July '17

NOTE:  These A/CC news pages will update less often for an extended period. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP efforts, and there may be some gaps in our traffic reporting for Earth's Busy Neighborhood.

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 24 July '17

Three objects reported inside ten LD

There are three transient natural objects reported traveling less than ten lunar distances (LD) from our planet today. Newly announced 2017 OM1 is inbound from 5.79 to 2.89 LD, NHATS target 2017 BS5 is outbound from 3.13 to 3.49 LD, and 2017 OE1 enters our ten-LD reporting "bubble," slipping in from 11.25 to 9.25 LD.

This report was generated at 2208 UTC with new discovery 2017 OM1 (MPEC) and with follow-up in today's DOU MPEC for 2017 BS5 and departed 2017 NN6, along with astrometry from October 2012 for risk-listed radar/NHATS target 2012 TC4, which will intrude into the Earth-Moon system this coming October.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 24 July '17

The MPC's NEO Confirmation Page has 10 listings

When last checked at 2302 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of fifteen 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 24 July '17

Minor Planet Electronic Circulars

As of last check at 2302 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-O47 - "19:42 UT" - 2017 OM1


MPEC 2017-O46 - "19:39 UT" - 2017 OL1


MPEC 2017-O45 - "16:32 UT" - Comet C/2017 O1


<< DOU on 24 July '17 >>  MPEC 2017-O44 - "11:59 UT" - Daily Orbit Update


MPEC 2017-O43 - "10:19 UT" - 2014 HV177

Observers  on 24 July '17

A total of 51 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-O45 -- C/2017 O1
E23Arcadia Obs. in New South Wales, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2017-O44 & 2017-O47 -- 2017 OM1, 2017 OD, 2017 NO6, 2017 NM6, 2017 NK, 2017 MV2, 2017 KU4, 2017 KR34, 2017 GQ4, 2017 AC5, 138846, 12538, 11398, 2329
T08ATLAS Mauna Loa in Hawaii, 5 in MPECs 2017-O44, 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1, 2017 NS5, 2017 NM6, 68950
V03Big Water Obs. in Utah, 1 in MPEC 2017-O47 -- 2017 OM1
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-O44 -- 2012 TC4
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2017-O45 -- C/2017 O1
160Castelmartini Obs. in Italy, 12 in MPECs 2017-O44 & 2017-O46 -- 2017 OL1, 2017 GQ6, 2017 BS5, 2008 MH1, 366733, 232368, 20460, 190166, 142561, 138925, 136818, 11398
107Cavezzo Obs. in Italy, 1 in MPEC 2017-O46 -- 2017 OL1
470Ceccano Obs. in Italy, 1 in MPEC 2017-O45 -- C/2017 O1
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-O45 -- C/2017 O1
G58Chabot Obs. in northern California, 1 in MPEC 2017-O47 -- 2017 OM1
113Drebach Obs. in Germany, 1 in MPEC 2017-O44 -- 2012 TC4
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2017-O44, 2017-O45, 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1, C/2017 O1, 2017 NR6
719Etscorn Obs. in New Mexico, 1 in MPEC 2017-O44 -- 142561
006Fabra Obs. in Spain, 1 in MPEC 2017-O44 -- 11398
734Farpoint Obs. in Kansas, 3 in MPECs 2017-O44, 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1, 2016 TE93
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
K88GINOP-KHK in Hungary, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
J95Great Shefford Obs. in England, 1 in MPEC 2017-O46 -- 2017 OL1
U69&program code "&" (15) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-O45 -- C/2017 O1
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-O45 -- C/2017 O1
U699Steven M. Tilley in Louisiana via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-O47 -- 2017 OM1
I894M. Suzuki in Japan via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-O47 -- 2017 OM1
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-O45 -- C/2017 O1
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-O45 -- C/2017 O1
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-O45 -- C/2017 O1
Q626Erik Bryssinck in Belgium via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-O45 -- C/2017 O1
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-O45 -- C/2017 O1
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-O45 -- C/2017 O1
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-O45 -- C/2017 O1
C10Maisoncelles Obs. in France, 1 in MPEC 2017-O45 -- C/2017 O1
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-O45 -- C/2017 O1
583Odessa-Mayaki Obs. in Ukraine, 1 in MPEC 2017-O44 -- 66391
K63Pascoli Obs. in Italy, 1 in MPEC 2017-O47 -- 2017 OM1
B49Paus Obs. in Spain, 1 in MPEC 2017-O47 -- 2017 OM1
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2017-O44 -- 2017 NS5
D29Purple Mtn. Obs. Xuyi Station in China, 4 in MPEC 2017-O44 -- 68348, 496124, 488465, 5143
W25RMS Obs., 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
G39ROAD in Chile, 1 in MPEC 2017-O45 -- C/2017 O1
L04ROASTERR-1 in Romania, 1 in MPEC 2017-O46 -- 2017 OL1
247roving observer, 1 in MPEC 2017-O45 -- C/2017 O1
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-O47 -- 2017 OM1
C95SATINO-1 in France, 1 in MPEC 2017-O46 -- 2017 OL1
033Schwarzschild Obs. in Germany, 5 in MPECs 2017-O44, 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1, 2017 OD1, 2017 NW5, 2016 QE84
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O44 -- 2017 LU
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-O45 -- C/2017 O1
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-O45 -- C/2017 O1
Y00SONEAR in Brazil, 9 in MPECs 2017-O44, 2017-O45, 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1, C/2017 O1, 2017 NN6, 1989 VB, 495858, 154589, 6053, 3752
587Sormano Obs. in Italy, 1 in MPEC 2017-O45 -- C/2017 O1
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-O44 -- 138925
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2017-O46 & 2017-O47 -- 2017 OM1, 2017 OL1
461SZTE Asteroid Program in Hungary, 1 in MPEC 2017-O44 -- 2012 TC4
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-O45 -- C/2017 O1
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-O43 -- 2014 HV177
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2017-O45 -- C/2017 O1
718Wiggins Obs. in Utah, 1 in MPEC 2017-O46 -- 2017 OL1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 July '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2302 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 OM1JPL Sentry22372084-211361.9175363e-06-4.98-5.250JPL: Computed at 15:09 today Pacific time based on 98 observations spanning 1.8136 days (2017-Jul-22.50692 to 2017-Jul-24.32054). Diameter approximately 0.074 km. from weighted mean H=23.30.
2017 NR6JPL Sentry1907R E M O V E DJPL: Risk listing removed at 1501 UTC today.

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 24 July '17

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

2237Noted that JPL Sentry has posted 2017 OM1 as an impact risk - see above
2208Generated Traffic Report
2012Grabbed MPEC 2017-O46 - 2017 OL1 - see above
Grabbed MPEC 2017-O47 - 2017 OM1 - see above
1907Noted that JPL Sentry has removed 2017 NR6 as an impact risk - see above
Grabbed MPEC 2017-O45 - Comet C/2017 O1 - see above
1318Grabbed MPEC 2017-O44 - Daily Orbit Update - see above
1205Grabbed MPEC 2017-O43 - 2014 HV177 - see above