Contents  on 18 January '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 18 January '17

One object reported inside ten LD

One small Solar-System body is reported inside ten lunar distances (LD) of our planet today. NHATS target 2016 YC8 comes its closest to Earth on this passage -- 9.47 LD at 0439 UTC. Next known to be coming to the neighborhood is risk-listed NHATS target 2005 VL1, which arrives within ten LD on February 1st, and then 2013 FK the next day.

This report was generated at 1811 UTC with second follow-up in today's DOU MPEC for departed NHATS target 2017 AF13 (9.17 days added to 2.03-day observation arc) along with astrometry from last September for 2016 SC17.

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 18 January '17

The MPC's NEO Confirmation Page has 32 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 32 objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 39 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 18 January '17

Minor Planet Electronic Circulars

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

MPEC 2017-B22 - "20:12 UT" - 2001 QE34

MPEC 2017-B21 - "18:25 UT" - Comet C/2017 A3 (Elenin)

MPEC 2017-B20 - "18:03 UT" - Comet C/2017 A1 (Panstarrs)

MPEC 2017-B19 - "16:24 UT" - 2017 AN20

MPEC 2017-B18 - "16:01 UT" - 2006 QF181

MPEC 2017-B17 - "15:59 UT" - 2013 SQ99

MPEC 2017-B16 - "15:57 UT" - 2013 SP99

MPEC 2017-B15 - "15:55 UT" - 2014 UE225

MPEC 2017-B14 - "15:53 UT" - 2014 UD225

MPEC 2017-B13 - "15:51 UT" - 2013 UP15

MPEC 2017-B12 - "15:48 UT" - 2013 UO15

MPEC 2017-B11 - "15:46 UT" - 2013 UN15

MPEC 2017-B10 - "15:44 UT" - 2013 UM15

MPEC 2017-B09 - "15:41 UT" - 2013 UL15

<< DOU on 18 Jan. '17 >>  MPEC 2017-B08 - "13:02 UT" - Daily Orbit Update

Observers  on 18 January '17

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
J57Alto Turia Obs. in Spain, 1 in MPEC 2017-B08 -- 203471
V03Big Water Obs. in Utah, 1 in MPEC 2017-B08 -- 2016 XD1
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2017-B08 -- 2014 AD17, 34613, 22753, 13651
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2017-B08 -- 2017 AY13, 2017 AV3, 2017 AK4, 2017 AF3, 2017 AF13, 2016 YX7, 2016 YJ3, 2016 XH1, 2016 WX9, 2016 WX8, 2016 WU3, 2016 WS9
J95Great Shefford Obs. in England, 1 in MPEC 2017-B22 -- 2001 QE34
Q60ISON Siding Spring Obs. in New South Wales, 1 in MPEC 2017-B21 -- C/2017 A3
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-B20 & 2017-B21 -- C/2017 A3, C/2017 A1
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2017-B08 -- 2014 JM25
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-B08 -- 265482
568@Jean-Marc Petit on Mauna Kea in Hawaii, 10 in MPECs 2017-B09, 2017-B10, 2017-B11, 2017-B12, 2017-B13, 2017-B14, 2017-B15, 2017-B16, 2017-B17 & 2017-B18 -- 2014 UE225, 2014 UD225, 2013 UP15, 2013 UO15, 2013 UN15, 2013 UM15, 2013 UL15, 2013 SQ99, 2013 SP99, 2006 QF181
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-B19 -- 2017 AN20
Z80Northolt Branch Obs. in England, 2 in MPEC 2017-B08 -- 2017 AF5, 2016 QN11
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2017-B08 & 2017-B19 -- 2017 AN20, 474163, 469634, 40263, 115052
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-B08 -- 2017 AZ13
G40!M. Kumrucu-Lohmiller in Massachusetts via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B08 -- 2017 AF5
W883B. Lutkenhoner in Germany via Chile Obs. in Chile, 1 in MPEC 2017-B21 -- C/2017 A3
Y00SONEAR in Brazil, 1 in MPEC 2017-B08 -- 5693
Q21Southern Utsunomiya in Japan, 1 in MPEC 2017-B20 -- C/2017 A1
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-B08 & 2017-B19 -- 2017 AY13, 2017 AN20, 2017 AM4, 2017 AF13
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-B08 -- 2016 SC17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 January '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2017 AP4NEODyS1630211514.31e-07-7.67-7.670NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2017-01-04.487 to 2017-01-09.349."
2017 AM4NEODyS16302024-205221.11e-06-1.77-1.770NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2017-01-03.522 to 2017-01-09.314."
2017 AK3NEODyS16302048-208241.69e-07-6.67-7.020NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2017-01-02.469 to 2017-01-17.432."
2016 WQ1NEODyS16302059-210327.85e-08-8.86-8.860NEODyS: "Based on 61 optical observations (of which 1 are rejected as outliers) from 2016-11-20.409 to 2016-12-24.446."
2016 TB57NEODyS16302088-2116142.35e-06-6.64-6.910NEODyS: "Based on 121 optical observations (of which 2 are rejected as outliers) from 2016-09-12.527 to 2016-12-24.652."

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 18 January '17

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

2110Grabbed MPEC 2017-B22 - 2001 QE34 - see above
1835Grabbed MPEC 2017-B20 - Comet C/2017 A1 (Panstarrs) - see above
Grabbed MPEC 2017-B21 - Comet C/2017 A3 (Elenin) - see above
1811Generated Traffic Report
1630Noted that NEODyS has updated its 2016 TB57 risk assessment - see above
Noted that NEODyS has updated its 2016 WQ1 risk assessment - see above
Noted that NEODyS has updated its 2017 AK3 risk assessment - see above
Noted that NEODyS has updated its 2017 AM4 risk assessment - see above
Noted that NEODyS has updated its 2017 AP4 risk assessment - see above
Grabbed MPEC 2017-B08 - Daily Orbit Update - see above
Grabbed MPEC 2017-B09 - 2013 UL15 - see above
Grabbed MPEC 2017-B10 - 2013 UM15 - see above
Grabbed MPEC 2017-B11 - 2013 UN15 - see above
Grabbed MPEC 2017-B12 - 2013 UO15 - see above
Grabbed MPEC 2017-B13 - 2013 UP15 - see above
Grabbed MPEC 2017-B14 - 2014 UD225 - see above
Grabbed MPEC 2017-B15 - 2014 UE225 - see above
Grabbed MPEC 2017-B16 - 2013 SP99 - see above
Grabbed MPEC 2017-B17 - 2013 SQ99 - see above
Grabbed MPEC 2017-B18 - 2006 QF181 - see above
Grabbed MPEC 2017-B19 - 2017 AN20 - see above