Contents  on 8 July '19

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 objects, and there may be some days without a traffic report 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 8 July '19

Eight objects reported inside ten LD

There are eight minor planets known to be within ten lunar distances (LD) of our planet today. Nearest is newly announced risk-listed intruder 2019 MB4, which enters the Earth-Moon system, coming in from 2.23 to 0.95 LD from the Earth while passing the Moon at 0.96 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.82 LD tomorrow 2019 MB4 22 m  0.95 from 2.23 LD July 2 - 15 NEW, intruder today, Moon closest 0.96 LD at 1741 UTC, risk - MPEC
0.83 LD July 10 2019 NN3 44 m  3.42 from 5.34 LD July 5 - 15 NEW, intruder, risk - MPEC
1.58 LD July 5 2019 NX1 10 m  4.25 to 6.10 LD June 30 - July 11
1.68 LD July 3 2019 NO2 8 m  9.35 to 11.31 LD June 28 - today exits ten LD, risk
4.35 LD today 2019 MT2 18 m  4.35 LD July 4 - 12 Earth closest at 1314 UTC, risk
5.76 LD July 3 2019 NL1 10 m  8.75 to 9.91 LD June 28 - tomorrow DOU
6.61 LD yesterday 2019 NP1 33 m  6.71 to 7.68 LD July 4 - 10
8.01 LD tomorrow 2016 NO56 24 m  8.15 from 8.97 LD yesterday - July 11
Approaching
7.82 LD July 13 2019 MW1 43 m  11.12 from 12.53 LD tomorrow - July 16

This report was generated at 1822 UTC with the discoveries of two inbound risk-listed intruders: 2019 NN3 (MPEC) and 2019 MB4 (MPEC). Today's DOU MPEC has follow-up for outbound 2019 NL1 and departed risk-listed intruder 2019 NK1 as well as newly reported observations from the discovery years of three risk-listed objects: 2013 TH6 (5.18 days added to 6.98-day observation arc), 2016 CH30 (17.17 days added to 4.12), and intruder 2017 EA (1.16 days added to 0.18), which flew by at 0.054 LD in March 2017.



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 temporal 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 8 July '19

The MPC's NEO Confirmation Page has 75 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 75 objects listed. Of these, 28 were "one nighters." So far The Tracking News has counted a total of 103 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 8 July '19

Minor Planet Electronic Circulars

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


MPEC 2019-N110 - "16:35 UT" - 2019 NW3


MPEC 2019-N109 - "14:19 UT" - 2019 NR3


MPEC 2019-N108 - "14:14 UT" - 2019 NQ3


<< DOU on 8 July '19 >>  MPEC 2019-N107 - "12:16 UT" - Daily Orbit Update


MPEC 2019-N106 - "02:16 UT" - 2019 NP3


MPEC 2019-N105 - "02:08 UT" - 2019 MB4


MPEC 2019-N104 - "02:03 UT" - 2019 NO3


MPEC 2019-N103 - "01:53 UT" - 2019 NN3

Observers  on 8 July '19

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2019-N108 & 2019-N110 -- 2019 NW3, 2019 NQ3
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2019-N103 & 2019-N105 -- 2019 NN3, 2019 MB4
X74Campo dos Amarais Obs., 1 in MPEC 2019-N107 -- 2019 MK2
160Castelmartini Obs. in Italy, 3 in MPEC 2019-N107 -- 2016 AU130, 66391, 2059
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 7 in MPECs 2019-N107 & 2019-N108 -- 2019 NT1, 2019 NQ3, 2019 NL1, 2019 LZ5, 2019 LS4, 2019 KX3, 2012 BE86
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-N106 & 2019-N108 -- 2019 NQ3, 2019 NP3
W84%program code "%" (14) via DECam in Chile, 3 in MPEC 2019-N107 -- 2017 EA, 2016 CH30, 2013 TH6
J27El Guijo Obs. in Spain, 1 in MPEC 2019-N107 -- 12538
K88GINOP-KHK in Hungary, 3 in MPECs 2019-N103, 2019-N104 & 2019-N105 -- 2019 NO3, 2019 NN3, 2019 MB4
E94Gisborne Obs. in New Zealand, 1 in MPEC 2019-N106 -- 2019 NP3
511Haute Provence Obs. in Germany, 1 in MPEC 2019-N107 -- 2019 NE2
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-N108 -- 2019 NQ3
W92MASTER OAFA Obs., 1 in MPEC 2019-N107 -- 4953
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2019-N105 & 2019-N109 -- 2019 NR3, 2019 MB4
711McDonald Obs. in Texas, 2 in MPECs 2019-N104 & 2019-N108 -- 2019 NQ3, 2019 NO3
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-N106 -- 2019 NP3
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2019-N103, 2019-N104, 2019-N106, 2019-N107, 2019-N108, 2019-N109 & 2019-N110 -- 2019 NW3, 2019 NR3, 2019 NQ3, 2019 NP3, 2019 NO3, 2019 NN3, 2015 OX78, 2015 OL35, 2012 HR69, 2001 YM4, 409934, 408869, 348304, 307070, 18106, 159609
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2019-N103, 2019-N104, 2019-N105, 2019-N107, 2019-N108 & 2019-N109 -- 2019 NR3, 2019 NQ3, 2019 NO3, 2019 NN3, 2019 MB4, 495222
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-N104 -- 2019 NO3
C95SATINO-1 in France, 1 in MPEC 2019-N107 -- 2019 KH2
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-N107 -- 2012 HR69
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-N107 -- 2019 NE2
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2019-N107 -- 2016 NH15, 2013 CK89
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2019-N104 & 2019-N107 -- 2019 NO3, 2019 NK1, 2011 OV18
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2019-N103, 2019-N104 & 2019-N105 -- 2019 NO3, 2019 NN3, 2019 MB4
I52Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2019-N107 & 2019-N109 -- 2019 NR3, 2019 NO1, 2019 NK2, 2019 NE2, 2019 NA, 2019 MX3, 2019 MV1, 2019 ME1, 2019 LX4, 2019 KE3, 2014 HH192
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-N107 -- 2019 NK1, 2019 MF3
L01Visnjan Obs., 3 in MPECs 2019-N104, 2019-N105 & 2019-N110 -- 2019 NW3, 2019 NO3, 2019 MB4
I41Zwicky Transient Facility (ZTF) in southern California, 10 in MPEC 2019-N107 -- 2019 MW, 2015 XC1, 2009 OB3, 85867, 481984, 455736, 408869, 276397, 18172, 7889
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 July '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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
2019 NO3JPL Sentry15002027-2109196.34195e-08-3.68-3.780JPL: Computed at 20:30 July 7th Pacific time based on 27 observations spanning 2.6989 days (2019-Jul-05.26841 to 2019-Jul-07.96735). Diameter approximately 0.460 km. from weighted mean H=19.35.
NEODyS15002027-2113284.83e-08-3.77-3.860NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2019-07-05.269 to 2019-07-07.968."
2019 NN3JPL Sentry15002091-211731.00337e-06-6.02-6.260JPL: Computed at 19:59 July 7th Pacific time based on 39 observations spanning 37.562 days (2019-May-31.399678 to 2019-Jul-07.96162). Diameter approximately 0.044 km. from weighted mean H=24.43.
NEODyS15002085-210842.08e-06-5.75-5.820NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2019-05-31.400 to 2019-07-07.962."
2019 NK1JPL Sentry15312089-2118496.2823751e-05-7.02-7.470JPL: Computed at 08:02 today Pacific time based on 34 observations spanning 4.0919 days (2019-Jul-04.33222 to 2019-Jul-08.42409). Diameter approximately 0.003 km. from weighted mean H=30.09.
NEODyS15002084-2118926.16e-05-7.21-7.630NEODyS: "Based on 44 optical observations (of which 10 are rejected as outliers) from 2019-07-02.459 to 2019-07-08.425."
2019 MB4JPL Sentry15002102-211737.4574e-06-6.01-6.160JPL: Computed at 20:32 July 7th Pacific time based on 29 observations spanning 8.6463 days (2019-Jun-29.27959 to 2019-Jul-07.92585). Diameter approximately 0.022 km. from weighted mean H=25.95.
NEODyS15002102-211751.55e-05-5.69-5.980NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2019-06-29.280 to 2019-07-07.927."
2019 MF3JPL Sentry15002105-211135.5642e-08-6.49-6.720JPL: Computed at 07:17 today Pacific time based on 32 observations spanning 7.9291 days (2019-Jun-29.41878 to 2019-Jul-07.347835). Diameter approximately 0.088 km. from weighted mean H=22.92.
NEODyS15002095-2114153.53e-07-5.71-6.120NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2019-06-29.420 to 2019-07-07.349."
2017 EAJPL Sentry1500R E M O V E DJPL: Risk listing removed at 1413 UTC today
NEODyS1500R E M O V E D-
2016 CH30JPL Sentry15002100-211851.113339e-05-6.72-6.760JPL: Computed at 07:07 today Pacific time based on 38 observations spanning 21.289 days (2016-Jan-17.25169 to 2016-Feb-07.54085). Diameter approximately 0.009 km. from weighted mean H=27.81.
NEODyS15002100-2118101.11e-05-6.73-6.790NEODyS: "Based on 40 optical observations (of which 3 are rejected as outliers) from 2016-01-17.252 to 2016-02-07.542."
2014 CH13JPL Sentry15002024-21161341.340693e-07-6.56-7.050JPL: Computed at 23:36 April 20th of 2017 Pacific time based on 16 observations spanning .96308 days (2014-Feb-10.36764 to 2014-Feb-11.33072). Diameter approximately 0.047 km. from weighted mean H=24.28.
2013 TH6NEODyS1500R E M O V E D-
2011 AE3JPL Sentry15002020-21176195.78435526000001e-05-5.27-5.700JPL: Computed at 01:02 April 9th of 2017 Pacific time based on 16 observations spanning .04277 days (2011-Jan-04.23829 to 2011-Jan-04.28106). Diameter approximately 0.010 km. from weighted mean H=27.66.

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 8 July '19

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

1822Generated Traffic Report
1701Grabbed MPEC 2019-N110 - 2019 NW3 - see above
1531Noted that JPL Sentry has updated its 2019 NK1 risk assessment - see above
1500Noted that JPL Sentry has updated its 2011 AE3 risk assessment - see above
Noted that NEODyS has removed 2013 TH6 as an impact risk - see above
Noted that JPL Sentry has updated its 2014 CH13 risk assessment - see above
Noted that JPL Sentry has updated its 2016 CH30 risk assessment - see above
Noted that NEODyS has updated its 2016 CH30 risk assessment - see above
Noted that JPL Sentry has removed 2017 EA as an impact risk - see above
Noted that NEODyS has removed 2017 EA as an impact risk - see above
Noted that JPL Sentry has posted 2019 MB4 as an impact risk - see above
Noted that NEODyS has posted 2019 MB4 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 MF3 risk assessment - see above
Noted that NEODyS has updated its 2019 MF3 risk assessment - see above
Noted that NEODyS has updated its 2019 NK1 risk assessment - see above
Noted that JPL Sentry has posted 2019 NN3 as an impact risk - see above
Noted that NEODyS has posted 2019 NN3 as an impact risk - see above
Noted that JPL Sentry has posted 2019 NO3 as an impact risk - see above
Noted that NEODyS has posted 2019 NO3 as an impact risk - see above
Grabbed MPEC 2019-N103 - 2019 NN3 - see above
Grabbed MPEC 2019-N104 - 2019 NO3 - see above
Grabbed MPEC 2019-N105 - 2019 MB4 - see above
Grabbed MPEC 2019-N106 - 2019 NP3 - see above
Grabbed MPEC 2019-N107 - Daily Orbit Update - see above
Grabbed MPEC 2019-N108 - 2019 NQ3 - see above
Grabbed MPEC 2019-N109 - 2019 NR3 - see above