Radar image of 2014 JO25 from Goldstone April 18th. 
Credit: NASA/JPL-Caltech/GSSR

NASA/JPL has posted news about 2014 JO25 along with radar imagery from April 18th, of which this is an excerpt. The object is described as a contact binary with the larger component estimated at 620 meters wide. See an animation. Image credit: NASA/JPL-Caltech/GSSR.


Contents  on 20 April '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 20 April '17

Three objects reported inside ten LD

There are three minor objects reported inside ten lunar distances (LD) of our home world today. Radar target 2014 JO25 starts the day as the closest of these and ends as the furthest, exiting our ten-LD traffic reporting sphere as it rushes off from 5.85 to 12.09 LD. NASA/JPL has news about radar imaging of this object (see above), including an animation. See also a new report on how NASA studies asteroids.

Earth passage I D ~Size Distance Today  Notes
1.05 LD April 32017 FT102 4 m  8.17 to 8.67 LD NHATS target
3.77 LD April 222017 HD 14 m  6.04 from 8.37 LD
4.57 LD yesterday2014 JO25 812 m  5.85 to 12.09 LD exits ten LD, radar target - DOU
Approaching
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was generated at 1842 UTC with the recovery of distant NHATS target 436724 2011 UW158 in today's DOU MPEC along with follow-up for 2017 CS, 2014 JO25, and departed NHATS target 2017 DC36, plus astrometry from March for two other NHATS targets: 2017 FB3 and risk-listed 2017 FL64.

2359 UTC note:  Discoveries of four close passers were announced today, but we have not yet been able to query the NASA/JPL Horizons database to obtain the data needed to do our reporting here. JPL is showing that two of these only came inside ten LD briefly -- 2017 HZ (MPEC) and 2017 HW (MPEC) on April 12th and 18th, respectively, while the other two are coming in for passages at more than three LD on April 24th -- 2017 HY (MPEC) and 2017 HB1 (MPEC).



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 20 April '17

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 77 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 20 April '17

Minor Planet Electronic Circulars

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


MPEC 2017-H31 - "18:50 UT" - 2017 HC1


MPEC 2017-H30 - "18:47 UT" - 2017 HB1


MPEC 2017-H29 - "18:43 UT" - 2017 HA1


MPEC 2017-H28 - "18:40 UT" - 2017 HZ


MPEC 2017-H27 - "18:37 UT" - 2017 HY


MPEC 2017-H26 - "18:34 UT" - 2017 HX


MPEC 2017-H25 - "18:31 UT" - 2017 HW


MPEC 2017-H24 - "18:27 UT" - 2017 HV


MPEC 2017-H23 - "18:24 UT" - 2017 HU


MPEC 2017-H22 - "18:21 UT" - 2017 HT


MPEC 2017-H21 - "18:17 UT" - 2017 HS


MPEC 2017-H20 - "16:30 UT" - Comet 41P/Tuttle-Giacobini-Kresak


<< DOU on 20 Apr. '17 >>  MPEC 2017-H19 - "12:01 UT" - Daily Orbit Update

Observers  on 20 April '17

A total of 119 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
C97Al-Fulaij Obs., 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
K40Altdorf Obs. in Germany, 1 in MPEC 2017-H20 -- 41P
705"Kristie Nault via Apache Point Obs. in New Mexico, 2 in MPECs 2017-H24 & 2017-H28 -- 2017 HZ, 2017 HV
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-H30 -- 2017 HB1
Z78Arroyo Obs., 1 in MPEC 2017-H20 -- 41P
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPECs 2017-H19 & 2017-H29 -- 2017 HA1, 2017 GR5, 2017 FT128, 2017 FS64, 2017 FR2, 2017 FP91, 2017 FO91, 2017 FO128, 2017 FN, 2017 FL91, 2017 FF101, 2017 FD157, 2017 EA3, 2016 WF9, 2016 PQ39, 2016 BO1, 2011 GD68, 2010 JT34, 2008 EN6, 2004 JQ1, 276732
T05ATLAS Haleakala in Hawaii, 3 in MPECs 2017-H19 & 2017-H20 -- 391508, 11398, 41P
T08ATLAS Mauna Loa in Hawaii, 4 in MPECs 2017-H19 & 2017-H20 -- 484795, 252091, 138359, 41P
C77Bernezzo Obs. in Italy, 2 in MPECs 2017-H19 & 2017-H30 -- 2017 HB1, 2014 JO25
C86Blanes Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
I72Carpe Noctem Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
B53Casal Lumbroso Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
B66Casasco Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
G30Casselman Obs. in Ontario, 1 in MPEC 2017-H20 -- 41P
160Castelmartini Obs. in Italy, 3 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 137170, 41P
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2017-H19, 2017-H27 & 2017-H30 -- 2017 HY, 2017 HB1, 2017 GT5, 2017 FG128, 2017 DT37, 2011 ED78, 90075, 484795, 475665, 456651, 39796, 248083, 138359, 138095, 137158, 1917
107Cavezzo Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPEC 2017-H19 -- 2017 GO6, 2017 FZ101, 2017 FY90, 2017 FT2, 2017 FP102, 2017 FP101, 2017 FL128, 2017 FL102, 2017 FK91, 2017 FK128, 2017 FK101, 2017 FG3, 2017 DC36, 2017 DC109, 2017 CO5, 2017 CN32, 2017 CG1, 2017 BC30, 2016 TZ56
A58Chalandray-Canotiers Obs. in France, 1 in MPEC 2017-H20 -- 41P
A77Chante-Perdrix Obs. in France, 1 in MPEC 2017-H20 -- 41P
970Chelmsford Obs. in England, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
B92Chinon Obs. in France, 2 in MPECs 2017-H19 & 2017-H20 -- 143404, 41P
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
958Dax Obs. in France, 4 in MPECs 2017-H20, 2017-H23, 2017-H27 & 2017-H30 -- 2017 HY, 2017 HU, 2017 HB1, 41P
K02Eastwood Obs. in England, 1 in MPEC 2017-H20 -- 41P
I57Elche Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2017-H30 -- 2017 HB1
G26Fushan Obs. in China, 1 in MPEC 2017-H20 -- 41P
372Geisei Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
D08Ghezz Obs. in Switzerland, 1 in MPEC 2017-H20 -- 41P
203GiaGa Obs. in Italy, 1 in MPEC 2017-H30 -- 2017 HB1
B83Gieres Obs. in France, 1 in MPEC 2017-H20 -- 41P
K88GINOP-KHK in Hungary, 1 in MPEC 2017-H23 -- 2017 HU
K73Gravina Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
J95Great Shefford Obs. in England, 3 in MPECs 2017-H23, 2017-H25 & 2017-H30 -- 2017 HW, 2017 HU, 2017 HB1
238Grorudalen Obs. in Norway, 1 in MPEC 2017-H20 -- 41P
458Guadarrama Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
D88Hiratsuka Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
750Hobbs Obs. in Wisconsin, 1 in MPEC 2017-H20 -- 41P
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-H20 -- 41P
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2017-H20 -- 41P
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2017-H19 -- 475665, 5604
U69"M. Suzuki in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-H20 -- 41P
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-H20 -- 41P
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-H20 -- 41P
I89/program code "/" (24) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-H20 -- 41P
I894M. Suzuki in Japan via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-H20 -- 41P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2017-H20 -- 41P
695@program code "@" (41) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2017-H20 -- 41P
168Kourovskaya Obs. in Russia, 1 in MPEC 2017-H20 -- 41P
D95Kurihara Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 2 in MPEC 2017-H19 -- 2012 YJ8, 2010 CN44
J38La Vara Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
V37LCOGT Fort Davis in Texas, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
T04LCOGT Haleakala OGG B#2 in Hawaii, 1 in MPEC 2017-H20 -- 41P
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-H26 -- 2017 HX
K92LCOGT Sutherland B in South Africa, 2 in MPECs 2017-H21 & 2017-H27 -- 2017 HY, 2017 HS
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-H20 -- 41P
K22Les Barres Obs. in France, 1 in MPEC 2017-H20 -- 41P
K38M57 Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
Q19Machida Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
C10Maisoncelles Obs. in France, 1 in MPEC 2017-H20 -- 41P
A02Masia Cal Maciarol Modul 8 in Spain, 1 in MPEC 2017-H20 -- 41P
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-H19 -- 5143
Z50Mazariegos Obs., 1 in MPEC 2017-H20 -- 41P
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2017-H20 -- 41P
152Moletai Obs. in Lithuania, 1 in MPEC 2017-H20 -- 41P
213Montcabre Obs. in Spain, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
108Montelupo Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
900Moriyama Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
474Mt. John Obs. in New Zealand, 9 in MPECs 2017-H19, 2017-H27, 2017-H28, 2017-H29 & 2017-H30 -- 2017 HZ, 2017 HY, 2017 HB1, 2017 HA1, 2017 GK7, 2017 FL102, 2017 FK91, 2017 ES2, 2017 CG1
G96Mt. Lemmon Survey (MLS) in Arizona, 29 in MPECs 2017-H19, 2017-H22, 2017-H23, 2017-H24, 2017-H25, 2017-H26, 2017-H27, 2017-H28, 2017-H29, 2017-H30 & 2017-H31 -- 2017 HZ, 2017 HY, 2017 HX, 2017 HW, 2017 HV, 2017 HU, 2017 HT, 2017 HC1, 2017 HB1, 2017 HA1, 2017 GT5, 2017 FS101, 2017 FR64, 2017 DS35, 2017 BU31, 2016 QC84, 2014 VN6, 2014 JO25, 2000 UW13, 2000 AF205, 1998 HK1, 436724, 413002, 381906, 370307, 274138, 242187, 193178, 4015
K74Muensterschwarzach Obs. in Germany, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
D81Nagano Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-H20 -- 41P
J69North Obs. in England, 2 in MPEC 2017-H19 -- 2017 GB8, 2014 JO25
Z80Northolt Branch Obs. in England, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
Z48Northolt Branch Obs. 2 Shepherd's Bush in England, 1 in MPEC 2017-H20 -- 41P
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-H20 -- 41P
583Odessa-Mayaki Obs. in the Ukraine, 1 in MPEC 2017-H20 -- 41P
C23Olmen Obs. in Belgium, 2 in MPECs 2017-H19 & 2017-H20 -- 2014 JO25, 41P
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2017-H19, 2017-H20, 2017-H21, 2017-H27, 2017-H30 & 2017-H31 -- 2017 HY, 2017 HS, 2017 HC1, 2017 HB1, 2017 GB8, 2017 FE90, 2017 FE101, 2017 DT37, 2013 RM43, 2012 HL31, 2011 QP96, 1917, 41P
K63Pascoli Obs. in Italy, 1 in MPEC 2017-H23 -- 2017 HU
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPECs 2017-H19 & 2017-H20 -- 2017 GT5, 2017 FH101, 2017 FG128, 2017 AC5, 2014 JO25, 1998 HK1, 41P
W25RMS Obs., 3 in MPECs 2017-H20, 2017-H27 & 2017-H30 -- 2017 HY, 2017 HB1, 41P
L04ROASTERR-1 in Romania, 1 in MPEC 2017-H20 -- 41P
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2017-H20 -- 41P
247roving observer, 1 in MPEC 2017-H20 -- 41P
434San Benedetto Po Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-H22 & 2017-H26 -- 2017 HX, 2017 HT
A29Santa Maria a Monte Obs. in Italy, 1 in MPEC 2017-H20 -- 41P
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
L23Schela Obs. in Romania, 1 in MPEC 2017-H20 -- 41P
204Schiaparelli Obs. in Italy, 2 in MPECs 2017-H27 & 2017-H30 -- 2017 HY, 2017 HB1
K14Sencelles Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
Q11Shinshiro Obs., 1 in MPEC 2017-H20 -- 41P
510Siegen Obs. in Germany, 1 in MPEC 2017-H20 -- 41P
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-H20 -- 41P
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-H20 -- 41P
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-H20 -- 41P
691Spacewatch 0.9m telescope in Arizona, 10 in MPECs 2017-H19, 2017-H21, 2017-H22 & 2017-H24 -- 2017 HV, 2017 HT, 2017 HS, 2017 FQ64, 2017 FP64, 2017 FE65, 2017 DC109, 2017 CS, 2016 SD, 2014 NA64
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2017-H19 & 2017-H21 -- 2017 HS, 2017 GM6, 2017 FO128, 2017 FN128, 2017 FD157, 2017 ER13, 2017 BD29, 2017 AM4, 2016 WF9, 2015 FM33
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-H20 -- 41P
I93St. Pardon de Conques Obs. in France, 7 in MPECs 2017-H23, 2017-H26, 2017-H27, 2017-H28, 2017-H29, 2017-H30 & 2017-H31 -- 2017 HZ, 2017 HY, 2017 HX, 2017 HU, 2017 HC1, 2017 HB1, 2017 HA1
K21St. Saturnin les Avignon Obs. in France, 1 in MPEC 2017-H20 -- 41P
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2017-H20 -- 41P
A71Stixendorf Obs. in Austria, 1 in MPEC 2017-H20 -- 41P
Q38Swan Hill Obs., 1 in MPEC 2017-H20 -- 41P
J22Tacande Obs. in the Canary Islands, 2 in MPECs 2017-H20 & 2017-H23 -- 2017 HU, 41P
I81Tarbatness Obs. in Scotland, 1 in MPEC 2017-H20 -- 41P
926Tenagra II Obs. in Arizona, 3 in MPECs 2017-H21, 2017-H26 & 2017-H28 -- 2017 HZ, 2017 HX, 2017 HS
C35Terrassa Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2017-H19 -- 2017 FL64, 2017 FB3, 2016 FS13, 2016 CF194
Z55Uraniborg Obs., 1 in MPEC 2017-H20 -- 41P
K17Valentines Obs., 1 in MPEC 2017-H20 -- 41P
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2017-H20 -- 41P
C90Vinyols Obs. in Spain, 1 in MPEC 2017-H20 -- 41P
I13Washington D.C. Obs. in Washington, D.C., 1 in MPEC 2017-H20 -- 41P
Z92West Park Obs. in England, 1 in MPEC 2017-H20 -- 41P
C51WISE in Earth polar orbit, 2 in MPEC 2017-H19 -- 90075, 322966
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2017-H20 -- 41P
367Yatsuka Obs. in Japan, 1 in MPEC 2017-H20 -- 41P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 April '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 HJJPL Sentry21302067-2114225.905826e-06-6.51-7.290JPL: Computed at 14:12 today Pacific time based on 40 observations spanning 1.1715 days (2017-Apr-17.42568 to 2017-Apr-18.59713). Diameter approximately 0.011 km. from weighted mean H=27.42.
2015 HD1JPL Sentry19022047-206024.95e-08-8.18-8.470JPL: Computed at 11:49 today Pacific time based on 53 observations spanning 3.1680 days (2015-Apr-17.99064 to 2015-Apr-21.15867). Diameter approximately 0.011 km. from weighted mean H=27.37.
2014 HC196JPL Sentry18002112-211212.032e-10-10.10-10.10JPL: Computed at 10:54 today Pacific time based on 26 observations spanning 2.0399 days (2014-Apr-23.0423 to 2014-Apr-25.0822). Diameter approximately 0.031 km. from weighted mean H=25.19.
2014 GC49JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1612 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 20 April '17

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

2130Noted that JPL Sentry has updated its 2017 HJ risk assessment - see above
1902Noted that JPL Sentry has reposted 2015 HD1 as an impact risk - see above
Grabbed MPEC 2017-H25 - 2017 HW - see above
Grabbed MPEC 2017-H26 - 2017 HX - see above
Grabbed MPEC 2017-H27 - 2017 HY - see above
Grabbed MPEC 2017-H28 - 2017 HZ - see above
Grabbed MPEC 2017-H29 - 2017 HA1 - see above
Grabbed MPEC 2017-H30 - 2017 HB1 - see above
Grabbed MPEC 2017-H31 - 2017 HC1 - see above
1842Generated Traffic Report
1830Grabbed MPEC 2017-H21 - 2017 HS - see above
Grabbed MPEC 2017-H22 - 2017 HT - see above
Grabbed MPEC 2017-H23 - 2017 HU - see above
Grabbed MPEC 2017-H24 - 2017 HV - see above
1800Noted that JPL Sentry has updated its 2014 HC196 risk assessment - see above
1701Grabbed MPEC 2017-H20 - Comet 41P/Tuttle-Giacobini-Kresak - see above
1630Noted that JPL Sentry has removed 2014 GC49 as an impact risk - see above
1600Grabbed MPEC 2017-H19 - Daily Orbit Update - see above