Contents  on 12 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 12 July '19

Eight objects reported inside ten LD

There are eight small Solar-System bodies reported within ten lunar distances (LD) of our planet today. Nearest are intruder 2019 NN3, heading out from 2.72 to 4.62 LD, and risk-listed 2019 NX5, which is calculated with some uncertainty to be moving away from about 2.8 to 3.0 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 July 9 2019 MB4 21 m  4.35 to 5.91 LD July 2 - 15 intruder
0.83 LD July 10 2019 NN3 37 m  2.72 to 4.62 LD July 5 - 15 intruder - DOU
2.13 LD July 10 2019 NM5 13 m  3.44 to 5.12 LD July 5 - 15 DOU
2.6   LD July 9* 2019 NX5 5 m  2.8 to 3.0 LD June 13 - Aug. 4 EPU +/- 21 mins.*, NHATS target, risk
4.35 LD July 8 2019 MT2 18 m  9.60 to 11.87 LD July 4 - 12 exits ten LD, risk
5.56 LD July 9 2019 NP5 10 m  5.97 to 6.44 LD July 2 - 17 NHATS target, risk - DOU
7.82 LD tomorrow 2019 MW1 43 m  7.83 from 8.13 LD July 9 - 16
8.97 LD July 10 2019 NM4 56 m  9.59 to 10.34 LD July 7 - 12 exits ten LD
6.6   LD July 29* 2019 NN4 26 m  15.0 from 15.7 LD July 20 - Aug. 6 EPU +/- 13 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1750 UTC with follow-up in today's DOU MPEC for outbound objects 2019 NM5, intruder 2019 NN3, and risk-listed 2019 NP5, and for departed 2019 MQ2.

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. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 12 July '19

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 34 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 12 July '19

Minor Planet Electronic Circulars

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

MPEC 2019-N151 - "20:52 UT" - 2019 NL6

MPEC 2019-N150 - "13:11 UT" - 2019 NK6

<< DOU on 12 July '19 >>  MPEC 2019-N149 - "12:03 UT" - Daily Orbit Update

MPEC 2019-N148 - "11:14 UT" - 2019 AG13

MPEC 2019-N147 - "01:41 UT" - 2018 XY3

Observers  on 12 July '19

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2019-N149 & 2019-N150 -- 2019 NK6, 2019 MV1
X74Campo dos Amarais Obs., 1 in MPEC 2019-N149 -- 2019 MK2
160Castelmartini Obs. in Italy, 5 in MPEC 2019-N149 -- 2019 NE2, 66391, 326777, 231134, 137170
K88GINOP-KHK in Hungary, 1 in MPEC 2019-N149 -- 2019 NN3
J95Great Shefford Obs. in England, 5 in MPEC 2019-N149 -- 2019 NX2, 2019 NP5, 2019 NM5, 2019 MQ2, 2019 MA2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2019-N150 & 2019-N151 -- 2019 NL6, 2019 NK6
568^R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2019-N149, 2019-N150 & 2019-N151 -- 2019 NP5, 2019 NL6, 2019 NK6
C653program code 3 via Montsec Obs. in Spain, 1 in MPEC 2019-N149 -- 2019 NO3
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-N149 & 2019-N150 -- 2019 NK6, 2018 XY3
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-N150 -- 2019 NK6
C95SATINO-1 in France, 1 in MPEC 2019-N149 -- 2019 MV1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2019-N147, 2019-N148 & 2019-N149 -- 2019 GO, 2019 GF20, 2019 AG13, 2018 XY3, 2001 OT
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2019-N149 -- 2019 MA, 2015 XC1, 68950, 470951, 441825, 401857, 355256
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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.





Notes for Today's Latest Risk Assessments
2019 NP5JPL Sentry15002106-211662.74588e-05-6.26-6.640JPL: Computed at 07:13 today Pacific time based on 20 observations spanning 5.5086 days (2019-Jul-06.51525 to 2019-Jul-12.023813). Diameter approximately 0.010 km. from weighted mean H=27.57.
NEODyS15002111-211638.13e-06-6.82-6.890NEODyS: "Based on 20 optical observations (of which 2 are rejected as outliers) from 2019-07-06.516 to 2019-07-12.025."
2019 NO3JPL Sentry1500R E M O V E DJPL: Risk listing removed at 1356 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 12 July '19

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

2101Grabbed MPEC 2019-N151 - 2019 NL6 - see above
1750Generated Traffic Report
1500Noted that JPL Sentry has removed 2019 NO3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 NP5 risk assessment - see above
Noted that NEODyS has updated its 2019 NP5 risk assessment - see above
Grabbed MPEC 2019-N147 - 2018 XY3 - see above
Grabbed MPEC 2019-N148 - 2019 AG13 - see above
Grabbed MPEC 2019-N149 - Daily Orbit Update - see above
Grabbed MPEC 2019-N150 - 2019 NK6 - see above