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Contents  on 16 January '17

• Traffic Report -- two objects
• IAU Minor Planet Center
  • NEOCP Activity -- 48 listings
  • New MPECs -- four MPECs
• Observers -- 23 observers
• Impact Risk Monitoring -- one object
• Chronology

Asteroid/Comet Connection (A/CC) Resources:

• Consolidated Risk Tables - the CRT page
  
• Ephemerides for risk-rated, nearby objects & NHATS targets
• News archive (old) & news image catalog (discontinued)
• Object Links - mainly for radar targets & close passers (mostly discontinued)
• Observing Campaigns (revised 8 April)

The latest A/CC news is available via framed access,  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.

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Traffic Report  on 16 January '17

Two objects reported inside ten LD

There are two minor objects reported passing inside ten lunar distances (LD) of Earth today. 2017 AJ13 is outbound from 7.66 to 9.06 LD and NHATS target 2016 YC8 enters our ten-LD traffic reporting "bubble," coming in from 10.02 to 9.64 LD. No other objects are currently known to come this close until February 1st.

This report was generated at 1940 UTC with follow-up in today's DOU MPEC for 2017 AJ13 and, from late December, risk-listed 2016 WQ1.

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.

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NEOCP Activity  on 16 January '17

The MPC's NEO Confirmation Page has 48 listings

When last checked at 2324 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, eight were "one nighters." The Tracking News counted a total of 54 listings on the NEOCP on this day.

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New MPECs  on 16 January '17

Minor Planet Electronic Circulars

There were four MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2017-B01 time-stamped "13:03 UT" - Daily Orbit Update - see below
• MPEC 2017-B02 time-stamped "23:49 UT" - 2017 AN19 - see below
• MPEC 2017-B03 time-stamped "23:53 UT" - 2017 AO19 - see below
• MPEC 2017-B04 time-stamped "23:56 UT" - 2017 AP19

MPEC 2017-B04 - "23:56 UT" - 2017 AP19

• K17A19P   2017 AP19 (small asteroid, Earth MOID=2.4 LD, H=23.6 ~65m) was picked up at 1441 UT on 9 Jan. by ATLAS Haleakala, observing it at Jan. 9.61-65p4. This detection was confirmed by Bisei Spaceguard Center (Jan. 9.82-83p6), Great Shefford Obs. (Jan. 10.01p3 & 13.94-95p2), LCOGT Tenerife Aqawan A#1 (Jan. 10.19-20p7 & 16.22-25p11), Modra Obs. (Jan. 11.18-20p4), LCOGT Fort Davis (Jan. 12.34-37p23), Magdalena Ridge Obs. (MRO) (Jan. 12.38-42p4), and LCOGT Haleakala OGG B#2 (Jan. 12.51-53p10).

MPEC 2017-B03 - "23:53 UT" - 2017 AO19

• K17A19O   2017 AO19 (q=2.015 AU, Q=11.193 AU, H=17.5 ~1.07 km) was picked up at 0839 UT on 7 Jan. by the Mt. Lemmon Survey (MLS), observing it at Jan. 7.36-41p7, 8.25-27p7, and 9.41p2. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Jan. 7.42-43p4, 8.28-29p4 & 9.24-25p3), the Spacewatch 0.9m telescope (Jan. 8.34-35p5), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 9.17-18p3 & 16.13p3), and Tenagra II Obs. (Jan. 9.21-23p3).

MPEC 2017-B02 - "23:49 UT" - 2017 AN19

• K17A19N   2017 AN19 (H=19.6 ~407m) was picked up at 0740 UT on 7 Jan. by MLS, observing it at Jan. 7.32-33p3, 7.40-41p4, 8.34p2, and 9.22-23p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Jan. 7.39-40p4), the Spacewatch 1.8m telescope (Jan. 8.22-23p3), Spacewatch 0.9m (Jan. 9.39-40p3), and Holmes/CTIO (Jan. 16.12p3).

<< DOU on 16 Jan. '17 >>  MPEC 2017-B01 - "13:03 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K16W01Q   2016 WQ1 (small asteroid, arc=34 days, H=27.8 ~9m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (Dec. 23.46p1 at G=24.5)
• Observations of recently (no longer) risk-listed objects
• K16Y04J   2016 YJ4 (small asteroid, Q=4.394 AU, arc=24 days, H=23.3 ~74m) from Holmes/CTIO (Jan. 16.09-10p3)
• K16W09F   2016 WF9 (Q=4.760 AU, arc=98 days, H=20.2 ~309m) from Holmes/CTIO (Jan. 16.05p3)
• Observations of close-passing objects
• K17A13J   2017 AJ13 (arc=8 days, H=24.2 ~49m) from North Obs. (Jan. 14.94-96p3)
• Observation campaigns (NHATS targets, radar support)
• K16Y01N   2016 YN1 (arc=32 days, H=23.6 ~65m, NHATS) from Holmes/CTIO (Jan. 16.06-07p3)
  -- NHATS target table & ephemerides
• Observations of small asteroids (H>22.0)
• K17A13O   2017 AO13 (arc=8 days, H=23.1 ~81m) from Pan-STARRS 1 (PS1) (Jan. 15.58-62p3)
• K17A03X   2017 AX3 (arc=14 days, H=22.8 ~93m) from Holmes/CTIO (Jan. 16.18-19p3)
• K17A03J   2017 AJ3 (arc=13 days, H=24.3 ~47m) from Holmes/CTIO (Jan. 16.23-24p3)
• K16Y00M   2016 YM (arc=29 days, H=22.1 ~129m) from Holmes/CTIO (Jan. 16.26-27p3)
• Observations of other objects
• K17A03W   2017 AW3 (arc=14 days, H=20.9 ~224m) from Holmes/CTIO (Jan. 16.20-21p3)
• K16Y10Z   2016 YZ10 (arc=17 days, H=20.9 ~224m) from PS1 (Jan. 15.43-47p4)
• K16Y10U   2016 YU10 (arc=22 days, H=19.0 ~537m) from PS1 (Jan. 15.59-63p4)
• K16Y08T   2016 YT8 (arc=18 days, H=20.4 ~282m) from program code "%" (14) via Slooh.com Canary Islands Obs. (Jan. 14.84-87p2)
• K16Y04N   2016 YN4 (Q=4.195 AU, arc=22 days, H=19.8 ~371m) from Purple Mtn. Obs. Xuyi Station (Jan. 15.60-62p2)
• K16Y03E   2016 YE3 (arc=76 days, H=20.9 ~224m) from Holmes/CTIO (Jan. 16.08-09p3)
• K16V05Y   2016 VY5 (arc=151 days, H=20.2 ~309m) from Holmes/CTIO (Jan. 16.07p3)
• K16V04C   2016 VC4 (arc=74 days, H=20.8 ~234m) from Holmes/CTIO (Jan. 16.20-22p3)
• K16UA1J   2016 UJ101 (arc=77 days, H=20.4 ~282m) from Holmes/CTIO (Jan. 16.18-19p3)
• K16U80U   2016 UU80 (arc=79 days, H=20.6 ~257m) from M. Kumrucu-Lohmiller via Slooh.com Chile Obs. (Jan. 15.14-15p3), Slooh.com CIO/code "%" (14) (Jan. 15.84p2), and Holmes/CTIO (Jan. 16.15p3)
• K16T56A   2016 TA56 (Q=4.791 AU, arc=101 days, H=18.1 ~812m) from Holmes/CTIO (Jan. 16.05p3)
• K16T55X   2016 TX55 (arc=99 days, H=20.0 ~339m) from Holmes/CTIO (Jan. 16.16-17p3)
• K16R40F   2016 RF40 (arc=128 days, H=21.5 ~170m) from Holmes/CTIO (Jan. 16.23-24p3 at V=22.1-2)
• K16R00U   2016 RU (arc=136 days, H=19.6 ~407m) from Holmes/CTIO (Jan. 16.11-12p3)
• K16Q84C   2016 QC84 (arc=2 opp, H=20.1 ~323m) from PS1 (Jan. 15.64-66p4)
• K16P66Z   2016 PZ66 (arc=155 days, H=19.4 ~446m) from Bigmuskie Obs. (Jan. 15.74-77p3)
• K16P01L   2016 PL1 (arc=186 days, H=18.7 ~616m) from Holmes/CTIO (Jan. 16.10-11p3)
• K16N00V   2016 NV (arc=197 days, H=19.8 ~371m) from Holmes/CTIO (Jan. 16.06p3)
• K05T00F   2005 TF (arc=2 opp, H=20.2 ~309m) from Xuyi Sta. (Jan. 15.65-69p3)
• l5665   475665 2006 VY13 from ATLAS Haleakala (Jan. 15.60-66p4)
• l0510   470510 2008 CJ116 from Castelmartini Obs. (2016 Oct. 3.81p3)
• Y7813   347813 2002 NP1 from Castelmartini Obs. (2016 Oct. 3.80p3)
• D8846   138846 2000 VJ61 from ATLAS Haleakala (Jan. 15.41-47p4)
• 97725   97725 2000 GB147 from Xuyi Sta. (Jan. 15.60-63p3)
• 96744   96744 1999 OW3 from Sergio Foglia via iTelescope Obs. Siding Spring (Jan. 15.47-49p2)

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Observers  on 16 January '17

A total of 23 observers appeared in this day's MPECs.

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Impact Risk Monitoring  on 16 January '17

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.

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Chronology  on 16 January '17

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