Contents  on 10 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 10 July '19

Ten objects reported inside ten LD

There are ten visitors reported to be less than ten lunar distances (LD) from our home world today, and three of them are inside its sphere of gravitational influence (SOI): Intruder 2019 NN3 is the nearest, passing us at 0.83 LD and the Moon at 0.86 LD, as it moves in from 1.59 LD and out to 1.04 LD from Earth. Intruder 2019 MB4 leaves the SOI as it flies away from 1.38 to 2.81 LD. And 2019 NM5 comes its closest on this passage, reaching 2.12 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 yesterday 2019 MB4 20 m  1.38 to 2.81 LD July 2 - 15 intruder, exits Earth SOI - DOU
0.83 LD today 2019 NN3 39 m  0.83 LD July 5 - 15 NEW, intruder today, Moon closest 0.86 LD at 0812 UTC, Earth
closest at 1628 UTC - DOU
1.58 LD July 5 2019 NX1 10 m  7.99 to 9.89 LD June 30 - tomorrow
2.12 LD today 2019 NM5 12 m  2.12 LD July 5 - 15 Moon closest 2.39 LD at 0646 UTC, Earth closest at 1500 UTC
4.35 LD July 8 2019 MT2 18 m  5.64 to 7.47 LD July 4 - 12 risk
5.57 LD yesterday 2019 NP5 10 m  5.57 to 5.67 LD July 2 - 17 NEW, risk - MPEC
6.61 LD July 7 2019 NP1 33 m  9.39 to 11.53 LD July 4 - 10 exits ten LD
7.82 LD July 13 2019 MW1 43 m  8.84 from 9.86 LD yesterday - July 16
8.01 LD yesterday 2016 NO56 24 m  8.09 to 8.80 LD July 7 - 11
8.97 LD today 2019 NM4 56 m  8.97 LD July 7 - 12 Earth closest at 0206 UTC - DOU
Approaching
6.6   LD July 29* 2019 NN4 26 m  16.4 from 17.2 LD July 20 - Aug. 6 Earth passage uncertainty +/- 13 mins.*, NHATS target - DOU

This report was generated at 1951 UTC with the discovery of outbound risk-listed 2019 NP5 (MPEC) and with follow-up in today's DOU MPEC for approaching 2019 NN4, passing objects 2019 NM4 and risk-listed intruder 2019 NN3, outbound risk-listed intruder 2019 MB4, departed objects 2019 MQ2 and risk-listed 2019 NL4 and 2019 MN2, and distant 2016 OF. Additionally, the DOU carries observations from their discovery years for nineteen other objects, including many first follow-ups and all from Pan-STARRS 1 (PS1). [7/11 note:  This group had a dozen or so first follow-up observations, including intruders 2018 PD20 (passed Earth at 0.087 LD in August 2018, 2.19 days added to 0.76-day discovery arc) and 2015 PK (0.207 LD in August 2015, 2.22 hours added to 20.34 hours).]



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began this traffic reporting (2007) but is not now so close. 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 10 July '19

The MPC's NEO Confirmation Page has 48 listings

When last checked at 2357 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, 22 were "one nighters." So far The Tracking News has counted a total of 60 listings on the NEOCP today.

New MPECs  on 10 July '19

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-N137 - "13:41 UT" - 2019 NQ5


MPEC 2019-N136 - "13:33 UT" - 2010 VW75


MPEC 2019-N135 - "13:18 UT" - 2019 NP5


MPEC 2019-N134 - "13:13 UT" - 2019 NO5


MPEC 2019-N133 - "13:09 UT" - 2014 QW362


<< DOU on 10 July '19 >>  MPEC 2019-N132 - "12:00 UT" - Daily Orbit Update

Observers  on 10 July '19

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-N132 -- 2019 NN3
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2019-N133, 2019-N135, 2019-N136 & 2019-N137 -- 2019 NQ5, 2019 NP5, 2014 QW362, 2010 VW75
X74Campo dos Amarais Obs., 1 in MPEC 2019-N132 -- 2019 NM4
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2019-N132 -- 2011 TC4, 2006 KE, 85989, 453778, 366733, 35107, 257744, 1865
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-N134 -- 2019 NO5
J27El Guijo Obs. in Spain, 3 in MPEC 2019-N132 -- 2019 GD3, 2019 EQ1, 2016 AU130
K88GINOP-KHK in Hungary, 1 in MPEC 2019-N135 -- 2019 NP5
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-N132 -- 2019 NN3
Z43Landehen Obs., 2 in MPEC 2019-N132 -- 2019 NN3, 326777
W79LCO Cerro Tololo Aqawan B#1 in Chile, 1 in MPEC 2019-N132 -- 2019 MA2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2019-N132, 2019-N133 & 2019-N137 -- 2019 NQ5, 2019 NN3, 2014 QW362
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2019-N134 & 2019-N135 -- 2019 NP5, 2019 NO5
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2019-N132, 2019-N133 & 2019-N137 -- 2019 NQ5, 2019 NN3, 2014 QW362
J69North Obs. in England, 3 in MPEC 2019-N132 -- 2019 NN3, 2019 MB4, 2019 MA2
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-N132 -- 2019 NN3
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2019-N132, 2019-N134, 2019-N135 & 2019-N136 -- 2019 NP5, 2019 NO5, 2019 AS8, 2018 XE4, 2018 PD20, 2018 LG4, 2018 KU2, 2017 WD, 2017 UW7, 2017 UO43, 2017 RB, 2017 QT32, 2017 GX6, 2017 EV, 2016 TR2, 2016 SY1, 2016 ET1, 2016 BY, 2016 BN14, 2015 VK64, 2015 PK, 2015 MZ130, 2014 QP434, 2013 SP19, 2010 VW75, 12538
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-N132 -- 2019 NN4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-N132 -- 2019 NN3
C95SATINO-1 in France, 1 in MPEC 2019-N132 -- 2019 MA
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2019-N132 -- 2019 NZ1, 2019 NG2, 2018 NP1, 2017 XD62, 2016 OF, 2014 LX14, 2013 GV68
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2019-N132 & 2019-N134 -- 2019 NR3, 2019 NO5, 2019 NO, 2019 NE1, 2019 JX6, 2016 NJ33
I52Steward Obs. Mt. Lemmon Station in Arizona, 28 in MPECs 2019-N132, 2019-N133, 2019-N134, 2019-N136 & 2019-N137 -- 2019 NU1, 2019 NQ5, 2019 NO5, 2019 NO4, 2019 NO3, 2019 NN3, 2019 NN1, 2019 NL4, 2019 NG2, 2019 NG, 2019 NE2, 2019 NB3, 2019 NA, 2019 MZ3, 2019 MY3, 2019 MV1, 2019 MR3, 2019 MG2, 2019 MF2, 2019 MB4, 2019 LL5, 2019 KH2, 2019 KB4, 2019 JE6, 2019 HC, 2019 GR21, 2014 QW362, 2010 VW75
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-N132 -- 2019 MN2, 2019 JL1
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2019-N132 -- 2019 MA2
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2019-N132 -- 2019 MQ2, 2015 XC1, 85867, 455736, 430440, 429733, 163081
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 July '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2357 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 NP5JPL Sentry16002103-2119132.369673e-05-6.33-6.720JPL: Computed at 08:46 today Pacific time based on 15 observations spanning 3.6653 days (2019-Jul-06.51525 to 2019-Jul-10.180574). Diameter approximately 0.010 km. from weighted mean H=27.57.
NEODyS16002111-211434.08e-06-7.11-7.450NEODyS: "Based on 15 optical observations (of which 2 are rejected as outliers) from 2019-07-06.516 to 2019-07-10.181."
2019 NL4JPL Sentry16002074-207417.870e-08-7.58-7.580JPL: Computed at 06:18 today Pacific time based on 15 observations spanning 5.7836 days (2019-Jul-04.568095 to 2019-Jul-10.35167). Diameter approximately 0.021 km. from weighted mean H=26.04.
NEODyS1600209111.31e-08-8.49-8.490NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2019-07-04.569 to 2019-07-10.352."
2019 NO3NEODyS1915R E M O V E DNEODyS #2 for the day
JPL Sentry16002027-2109101.71016e-08-4.30-4.380JPL: Computed at 06:15 today Pacific time based on 36 observations spanning 4.8960 days (2019-Jul-05.26841 to 2019-Jul-10.16442). Diameter approximately 0.436 km. from weighted mean H=19.46.
2019 NN3JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1323 UTC today
NEODyS1600R E M O V E D-
2019 MB4JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1335 UTC today
NEODyS1600R E M O V E D-
2019 MZ3JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1319 UTC today
NEODyS1600R E M O V E D-
2019 MN2JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1320 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 10 July '19

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

1951Generated Traffic Report
1915Noted that NEODyS has removed 2019 NO3 as an impact risk - see above
1600Noted that JPL Sentry has removed 2019 MB4 as an impact risk - see above
Noted that NEODyS has removed 2019 MB4 as an impact risk - see above
Noted that JPL Sentry has removed 2019 MN2 as an impact risk - see above
Noted that JPL Sentry has removed 2019 MZ3 as an impact risk - see above
Noted that NEODyS has removed 2019 MZ3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 NL4 risk assessment - see above
Noted that NEODyS has updated its 2019 NL4 risk assessment - see above
Noted that JPL Sentry has removed 2019 NN3 as an impact risk - see above
Noted that NEODyS has removed 2019 NN3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 NO3 risk assessment - see above
Noted that NEODyS has reposted 2019 NO3 as an impact risk - see above
Noted that JPL Sentry has posted 2019 NP5 as an impact risk - see above
Noted that NEODyS has posted 2019 NP5 as an impact risk - see above
Grabbed MPEC 2019-N132 - Daily Orbit Update - see above
Grabbed MPEC 2019-N133 - 2014 QW362 - see above
Grabbed MPEC 2019-N134 - 2019 NO5 - see above
Grabbed MPEC 2019-N135 - 2019 NP5 - see above
Grabbed MPEC 2019-N136 - 2010 VW75 - see above
Grabbed MPEC 2019-N137 - 2019 NQ5 - see above