Contents  on 16 May '19

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 16 May '19

Eleven objects reported inside ten LD

There are eleven small visitors reported within ten lunar distances (LD) of Earth today. Nearest is newly announced risk-listed intruder 2019 JH7, which began the day at its closest to our planet on this passage, reaching 0.19 LD, and flies out to 2.06 LD. It passed the Moon at 0.78 LD yesterday.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
0.19 LD today 2019 JH7 4 m  0.19 LD May 11 - 20 NEW, intruder today, NHATS target, Earth
closest at 0005 UTC, risk - MPEC, DOU
2.34 LD May 13 2019 JW5 12 m  5.74 to 8.16 LD May 10 - 17
2.48 LD May 20 2019 JL3 36 m  6.97 from 8.84 LD yesterday - May 25
3.15 LD May 13 2019 JK3 15 m  5.89 to 8.02 LD May 9 - 17
3.64 LD May 12 2019 JO2 25 m  9.46 to 11.75 LD May 8 - 16 exits ten LD
4.14 LD tomorrow 2012 KT12 19 m  4.18 from 4.38 LD May 7 - 27 NHATS target
4.43 LD today 2019 JN5 27 m  4.43 LD May 12 - 19 Earth closest at 0004 UTC
4.69 LD April 27 2019 GF1 10 m  8.80 to 9.15 LD April 7 - May 19 NHATS target
5.56 LD tomorrow 2019 JG1 16 m  5.56 from 5.89 LD May 12 - 21 NHATS target - DOU
6.09 LD tomorrow 2019 GT1 34 m  6.15 from 6.34 LD May 8 - 26 NHATS target
7.04 LD yesterday 2019 JN2 25 m  7.17 to 7.61 LD May 10 - 19 NHATS target

This report was generated at 1752 UTC with the discovery of tiny risk-listed intruder 2019 JH7 (MPEC, DOU), and with follow-up in today's DOU MPEC for inbound 2019 JG1 and departed 2018 VX8.

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 16 May '19

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 59 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 16 May '19

Minor Planet Electronic Circulars

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

<< DOU on 16 May '19 >>  MPEC 2019-K03 - "12:30 UT" - Daily Orbit Update

MPEC 2019-K02 - "10:21 UT" - 2019 JF7

MPEC 2019-K01 - "01:55 UT" - 2019 JH7

Observers  on 16 May '19

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2019-K03 -- 2019 HC, 2019 GD3, 2019 EQ1, 2018 XG5, 2018 XC2, 2018 VM3, 2006 FJ
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-K01 -- 2019 JH7
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-K01 & 2019-K02 -- 2019 JH7, 2019 JF7
J95Great Shefford Obs. in England, 2 in MPECs 2019-K01 & 2019-K03 -- 2019 JH7, 2006 QV89
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-K01 -- 2019 JH7
186Kitab Obs., 3 in MPEC 2019-K03 -- 2019 JB1, 2019 HC, 2018 XG5
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2019-K03 -- 2017 SY32
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-K01 -- 2019 JH7
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2019-K01 -- 2019 JH7
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2019-K03 -- 2005 EQ70
Z80Northolt Branch Obs. in England, 2 in MPECs 2019-K01 & 2019-K03 -- 2019 JH7, 2019 HC
C23Olmen Obs. in Belgium, 1 in MPEC 2019-K03 -- 2008 HS3
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2019-K02 -- 2019 JF7
C95SATINO-1 in France, 1 in MPEC 2019-K03 -- 2013 BE18
033Schwarzschild Obs. in Germany, 1 in MPEC 2019-K02 -- 2019 JF7
W88#program code "#" (12) via Chile Obs. in Chile, 1 in MPEC 2019-K03 -- 2018 VX8
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2019-K01 & 2019-K03 -- 2019 JH7, 2010 JL33
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2019-K01 & 2019-K02 -- 2019 JH7, 2019 JF7
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-K03 -- 2016 KR3
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPECs 2019-K01, 2019-K02 & 2019-K03 -- 2019 JH7, 2019 JG1, 2019 JF7, 2019 GD
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-K03 -- 2019 GP3, 2019 FU2
C51WISE in Earth polar orbit, 2 in MPEC 2019-K03 -- 2010 JL33, 429733
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 May '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 JH7JPL Sentry15302114-211829.259e-07-8.65-8.930JPL #2 for the day: Computed at 08:18 today Pacific time based on 74 observations spanning 1.6701 days (2019-May-14.33827 to 2019-May-16.008371). Diameter approximately 0.004 km. from weighted mean H=29.66.
NEODyS15302114-211821.04e-06-8.60-8.70NEODyS: "Based on 75 optical observations (of which 2 are rejected as outliers) from 2019-05-14.339 to 2019-05-16.009."
2006 QV89JPL Sentry18382019-2117170.000225566676-1.81-1.810JPL: Computed at 09:10 today Pacific time based on 69 observations spanning 9.8617 days (2006-Aug-29.30747 to 2006-Sep-08.16918) including radar (1 Doppler).. Diameter approximately 0.029 km. from weighted mean H=25.31.
NEODyS18382019-2096221.5e-04-3.59-3.60NEODyS #2 for the day: "Based on 70 optical observations (of which 0 are rejected as outliers) from 2006-08-29.308 to 2006-09-08.170."

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 16 May '19

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

1838Noted that JPL Sentry has updated its 2006 QV89 risk assessment - see above
Noted that NEODyS has updated its 2006 QV89 risk assessment - see above
1752Generated Traffic Report
1530Noted that NEODyS has updated its 2006 QV89 risk assessment - see above
Noted that JPL Sentry has updated its 2019 JH7 risk assessment - see above
Noted that NEODyS has posted 2019 JH7 as an impact risk - see above
Grabbed MPEC 2019-K02 - 2019 JF7 - see above
Grabbed MPEC 2019-K03 - Daily Orbit Update - see above
0401Noted that JPL Sentry has posted 2019 JH7 as an impact risk - see above
Grabbed MPEC 2019-K01 - 2019 JH7 - see above