Contents  on 6 May '17

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 6 May '17

Six objects reported inside ten LD

We have six visitors today inside ten lunar distances (LD) of Earth. Closest are newly announced intruder 2017 JQ1, outbound from 4.87 to 7.35 LD, and three inbound objects: new discovery 2017 JV1, which moves in from 7.66 to 5.30 LD, 2017 HX4 from 7.65 to 5.46 LD, and 2017 HU49 from 6.07 to 5.91 LD.

Earth passage I D ~Size Distance Today  Notes
0.44 LD May 42017 JQ1 5 m  4.87 to 7.35 LD NEW, intruder - MPEC
2.34 LD May 82017 JV1 21 m  5.30 from 7.66 LD NEW - MPEC
3.70 LD May 82017 HX4 18 m  5.46 from 7.65 LD
3.71 LD May 112017 JX1 22 m  8.27 from 9.91 LD NEW - MPEC
5.55 LD May 112017 HU49 18 m  5.91 from 6.07 LD
8.88 LD May 92017 JY1 31 m  9.97 from 10.93 LD NEW, enters ten LD - MPEC
Approaching
2.57 LD May 122017 JA2 40 m  < 10 LD May 8, NEW - MPEC
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was generated at 1920 UTC with five discoveries, all appearing in the active traffic table here, plus follow-up in today's DOU MPEC for approaching radar target 2017 CS and for departed objects 2017 HT49 and NHATS target 2017 FM2 (26.05 days added to its 14.85-day observation arc).



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 6 May '17

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 66 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 6 May '17

Minor Planet Electronic Circulars

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


MPEC 2017-J51 - "16:42 UT" - 2014 SV141


MPEC 2017-J50 - "16:38 UT" - 2017 JZ1


MPEC 2017-J49 - "16:34 UT" - 2017 JX1


MPEC 2017-J48 - "16:31 UT" - 2017 JQ1


MPEC 2017-J47 - "16:27 UT" - 2017 JA2


MPEC 2017-J46 - "16:23 UT" - 2017 JY1


MPEC 2017-J45 - "16:20 UT" - 2017 JW1


MPEC 2017-J44 - "16:16 UT" - 2017 JV1


MPEC 2017-J43 - "16:13 UT" - 2017 JU1


MPEC 2017-J42 - "16:09 UT" - 2017 JT1


MPEC 2017-J41 - "15:58 UT" - 2017 JS1


MPEC 2017-J40 - "15:54 UT" - 2017 JR1


MPEC 2017-J39 - "15:50 UT" - 2017 HY50


<< DOU on 6 May '17 >>  MPEC 2017-J38 - "12:00 UT" - Daily Orbit Update

Observers  on 6 May '17

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
J57Alto Turia Obs. in Spain, 3 in MPECs 2017-J39, 2017-J42 & 2017-J44 -- 2017 JV1, 2017 JT1, 2017 HY50
705"Kristie Nault via Apache Point Obs. in New Mexico, 1 in MPEC 2017-J42 -- 2017 JT1
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2017-J40, 2017-J41 & 2017-J48 -- 2017 JS1, 2017 JR1, 2017 JQ1
160Castelmartini Obs. in Italy, 13 in MPEC 2017-J38 -- 2017 GT5, 2017 GM4, 2017 GB8, 2017 FH101, 2017 FG128, 2017 AC5, 1998 HK1, 90075, 484795, 474231, 427643, 163696, 2329
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2017-J38 & 2017-J47 -- 2017 JA2, 2017 GU6, 2017 GQ6, 2016 WO1, 2014 KF91, 86819, 475665, 448003, 427643, 222073, 190166, 141531, 136923, 11398, 106589, 100926
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2017-J38 -- 136923
K65Cesena Obs. in Italy, 1 in MPEC 2017-J39 -- 2017 HY50
734Farpoint Obs. in Kansas, 3 in MPECs 2017-J46, 2017-J49 & 2017-J50 -- 2017 JZ1, 2017 JY1, 2017 JX1
K88GINOP-KHK in Hungary, 3 in MPECs 2017-J39, 2017-J40 & 2017-J48 -- 2017 JR1, 2017 JQ1, 2017 HY50
J95Great Shefford Obs. in England, 1 in MPEC 2017-J48 -- 2017 JQ1
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-J47 -- 2017 JA2
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-J47 -- 2017 JA2
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-J47 -- 2017 JA2
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 6 in MPEC 2017-J38 -- 2017 HU4, 2017 HR49, 2017 HK49, 2017 HJ49, 2017 HD49, 2010 LM14
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2017-J40, 2017-J41, 2017-J45, 2017-J46, 2017-J47, 2017-J48, 2017-J49 & 2017-J50 -- 2017 JZ1, 2017 JY1, 2017 JX1, 2017 JW1, 2017 JS1, 2017 JR1, 2017 JQ1, 2017 JA2
474Mt. John Obs. in New Zealand, 1 in MPEC 2017-J41 -- 2017 JS1
G96Mt. Lemmon Survey (MLS) in Arizona, 21 in MPECs 2017-J38, 2017-J39, 2017-J40, 2017-J41, 2017-J42, 2017-J43, 2017-J44, 2017-J45, 2017-J46, 2017-J47, 2017-J48, 2017-J49 & 2017-J50 -- 2017 JZ1, 2017 JY1, 2017 JX1, 2017 JW1, 2017 JV1, 2017 JU1, 2017 JT1, 2017 JS1, 2017 JR1, 2017 JQ1, 2017 JA2, 2017 HZ49, 2017 HY50, 2016 GH135, 2014 MK27, 2012 HN8, 2005 GB120, 250614, 243298, 138095, 11311
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2017-J38 -- 2016 WO1, 484517, 456651, 220124
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2017-J38 -- 2017 CS, 90075, 54789, 260141, 152931, 5653, 5604, 3352, 1036
H36Sandlot Obs. in Kansas, 3 in MPECs 2017-J44, 2017-J49 & 2017-J50 -- 2017 JZ1, 2017 JX1, 2017 JV1
204Schiaparelli Obs. in Italy, 2 in MPECs 2017-J44 & 2017-J47 -- 2017 JV1, 2017 JA2
033Schwarzschild Obs. in Germany, 1 in MPEC 2017-J39 -- 2017 HY50
587Sormano Obs. in Italy, 3 in MPECs 2017-J44, 2017-J46 & 2017-J47 -- 2017 JY1, 2017 JV1, 2017 JA2
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2017-J38, 2017-J40, 2017-J41, 2017-J42, 2017-J43 & 2017-J44 -- 2017 JV1, 2017 JU1, 2017 JT1, 2017 JS1, 2017 JR1, 2017 HP49, 2017 HG2
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2017-J38 -- 2017 HO49, 2014 JS54
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2017-J40 & 2017-J48 -- 2017 JR1, 2017 JQ1
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2017-J38, 2017-J39, 2017-J40, 2017-J41, 2017-J42, 2017-J43, 2017-J44, 2017-J45, 2017-J46, 2017-J47, 2017-J48, 2017-J49 & 2017-J50 -- 2017 JZ1, 2017 JY1, 2017 JX1, 2017 JW1, 2017 JV1, 2017 JU1, 2017 JT1, 2017 JS1, 2017 JR1, 2017 JQ1, 2017 JA2, 2017 HY50, 2017 HT49
926Tenagra II Obs. in Arizona, 8 in MPECs 2017-J39, 2017-J40, 2017-J41, 2017-J42, 2017-J44, 2017-J45, 2017-J47 & 2017-J48 -- 2017 JW1, 2017 JV1, 2017 JT1, 2017 JS1, 2017 JR1, 2017 JQ1, 2017 JA2, 2017 HY50
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2017-J38 & 2017-J51 -- 2017 FM2, 2014 SV141
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-J51 -- 2014 SV141
C51WISE in Earth polar orbit, 3 in MPEC 2017-J38 -- 164121, 141670, 141056
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 May '17

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 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 HZ4NEODyS19312082-2117423.77e-05-5.25-5.720NEODyS: "Based on 39 optical observations (of which 1 are rejected as outliers) from 2017-04-26.445 to 2017-05-05.363."

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 6 May '17

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

1931Noted that NEODyS has updated its 2017 HZ4 risk assessment - see above
1920Generated Traffic Report
1700Grabbed MPEC 2017-J48 - 2017 JQ1 - see above
Grabbed MPEC 2017-J49 - 2017 JX1 - see above
Grabbed MPEC 2017-J50 - 2017 JZ1 - see above
Grabbed MPEC 2017-J51 - 2014 SV141 - see above
1630Grabbed MPEC 2017-J41 - 2017 JS1 - see above
Grabbed MPEC 2017-J42 - 2017 JT1 - see above
Grabbed MPEC 2017-J43 - 2017 JU1 - see above
Grabbed MPEC 2017-J44 - 2017 JV1 - see above
Grabbed MPEC 2017-J45 - 2017 JW1 - see above
Grabbed MPEC 2017-J46 - 2017 JY1 - see above
Grabbed MPEC 2017-J47 - 2017 JA2 - see above
1600Grabbed MPEC 2017-J38 - Daily Orbit Update - see above
Grabbed MPEC 2017-J39 - 2017 HY50 - see above
Grabbed MPEC 2017-J40 - 2017 JR1 - see above