Contents  on 26 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 26 January '17

Three objects reported inside ten LD

Today three asteroidal objects are known to be within ten lunar distances (LD) of our planet. NHATS target intruder 2017 BX began the day less than one LD from the Moon while at 1.48 LD from Earth and moves out to 3.03 LD by day's end. Much further away are two newly announced objects. Risk-listed 2017 BS5 is outbound from 8.96 to 9.92 LD and 2017 BR5 exits our ten-LD traffic reporting "bubble," traveling from 9.03 to 11.31 LD. JPL is showing that 2017 BS5, which passed us at 6.54 LD five days ago, won't go too far away before returning for a 3.28-LD flyby this coming July 23rd.

Earth passage I D ~Size Distance Today  Notes
0.69 LD yesterday2017 BX 9 m  1.48 to 3.03 LD exits Earth SOI, intruder, NHATS target
2.11 LD Jan. 222017 BR5 10 m  9.03 to 11.31 LD NEW, exits ten LD - MPEC
6.54 LD Jan. 212017 BS5 46 m  8.96 to 9.92 LD NEW, risk - MPEC
Approaching
4.6   LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, uncertainty +/- 18 mins., radar/NHATS target - DOU
7.10 LD Feb. 52013 FK 78 m  < 10 LD Feb. 2
9.1   LD Feb. 42005 VL1 13 m  < 10 LD Feb. 1, uncertainty +/- 15.0000 hours, NHATS target, risk

This report was generated at 2105 UTC with new discoveries 2017 BS5 (MPEC) and 2017 BR5 (MPEC), and with first follow-up for departed NHATS target 2017 BY in today's DOU MPEC along with follow-up for approaching radar/NHATS target 2017 BW, departed NHATS target 2017 AG5, and distant 2007 XH16.



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not now so close. 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 26 January '17

The MPC's NEO Confirmation Page has 61 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 61 objects listed. Of these, 44 were "one nighters." So far The Tracking News has counted a total of 72 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 26 January '17

Minor Planet Electronic Circulars

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


MPEC 2017-B69 - "15:20 UT" - 2017 BS5


MPEC 2017-B68 - "15:14 UT" - 2017 BR5


MPEC 2017-B67 - "15:11 UT" - 2017 BQ5


MPEC 2017-B66 - "15:08 UT" - 2017 BP5


<< DOU on 26 Jan. '17 >>  MPEC 2017-B65 - "13:03 UT" - Daily Orbit Update

Observers  on 26 January '17

A total of 44 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2017-B65 -- 2017 BU, 2017 BT, 2017 BM3, 2017 BL3, 2017 AZ13, 2017 AO13, 2017 AM4, 2017 AF5, 2016 YN4
T05ATLAS Haleakala in Hawaii, 12 in MPECs 2017-B65 & 2017-B69 -- 2017 BS5, 2016 PR8, 2015 ME54, 2005 TF, 97725, 378610, 252558, 226198, 203471, 153201, 5653, 3691
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2017-B65 -- 106589
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-B69 -- 2017 BS5
160Castelmartini Obs. in Italy, 3 in MPEC 2017-B65 -- 474163, 12538, 7088
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-B69 -- 2017 BS5
107Cavezzo Obs. in Italy, 2 in MPEC 2017-B65 -- 2016 UU80, 1627
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2017-B66 & 2017-B67 -- 2017 BQ5, 2017 BP5
958Dax Obs. in France, 1 in MPEC 2017-B69 -- 2017 BS5
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPEC 2017-B65 -- 2017 BY, 2017 BF3, 2017 AT19, 2017 AN19, 2016 YO3, 2016 YL4, 2016 VZ18
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2017-B69 -- 2017 BS5
203GiaGa Obs. in Italy, 1 in MPEC 2017-B65 -- 85990
W85LCOGT Cerro Tololo A in Chile, 3 in MPEC 2017-B65 -- 2017 BO3, 265482, 192559
W86LCOGT Cerro Tololo B in Chile, 2 in MPECs 2017-B66 & 2017-B67 -- 2017 BQ5, 2017 BP5
Q63LCOGT Siding Spring A in New South Wales, 1 in MPEC 2017-B65 -- 192559
K92LCOGT Sutherland B in South Africa, 2 in MPECs 2017-B65 & 2017-B66 -- 2017 BP5, 265482
K93LCOGT Sutherland C in South Africa, 2 in MPEC 2017-B65 -- 2017 BW, 192559
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-B65 -- 2006 DX
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-B65 -- 87684
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-B65 -- 369264
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2017-B65 -- 2016 RT1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2017-B65 -- 2016 YN2
A24New Millennium Obs. in Italy, 17 in MPEC 2017-B65 -- 2016 LX48, 68950, 480004, 479325, 470510, 452389, 413260, 370307, 185851, 16834, 162269, 154244, 7341, 5836, 3352, 1943, 1863
J69North Obs. in England, 2 in MPEC 2017-B65 -- 2001 BX15, 438955
J43Oukaimeden Obs. in Morocco, 4 in MPEC 2017-B65 -- 312956, 152560, 9172, 6456
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2017-B65, 2017-B66, 2017-B67 & 2017-B68 -- 2017 BR5, 2017 BQ5, 2017 BP5, 2016 OP5, 36017
K63Pascoli Obs. in Italy, 1 in MPEC 2017-B69 -- 2017 BS5
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2017-B65 -- 2016 YT8
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 22 in MPEC 2017-B65 -- 2017 BW, 2017 BM3, 2017 BL3, 2017 AG5, 2017 AF5, 2016 YN4, 2016 UU80, 2016 UE101, 2016 QN11, 2016 LM8, 2014 EW24, 2014 AD17, 2011 WO41, 2005 TF, 2001 QE34, 97725, 438955, 22753, 203471, 138846, 13651, 5693
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-B65 -- 2012 XE17
W25RMS Obs., 2 in MPEC 2017-B65 -- 262623, 138859
Q11Shinshiro Obs., 3 in MPEC 2017-B65 -- 138846, 4954, 1627
G40%program code "%" (14) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B65 -- 2015 BN509
587Sormano Obs. in Italy, 1 in MPEC 2017-B69 -- 2017 BS5
G45Space Surveillance Telescope Atom Site in New Mexico, 1 in MPEC 2017-B68 -- 2017 BR5
291Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2017-B65 -- 2017 BN3, 2017 AN19, 2016 YL4, 2016 YH8, 2016 WU3, 2016 WG10, 2016 WB2, 2016 SG45, 2014 YN44, 2012 RG3, 2012 MR7, 2007 XH16, 2006 KQ1, 2006 JT
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-B65 -- 152560
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-B69 -- 2017 BS5
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2017-B65 -- 138846
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2017-B65 -- 2016 YN2
926Tenagra II Obs. in Arizona, 5 in MPECs 2017-B65, 2017-B68 & 2017-B69 -- 2017 BY, 2017 BS5, 2017 BR5, 2017 BE3, 2016 WZ1
Z52The Studios Obs., 4 in MPEC 2017-B65 -- 137924, 4179, 3352, 2102
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2017-B65 -- 2017 BW, 2017 BU, 2017 BL3, 2016 YN13
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2017-B65 -- 96590, 378610, 347813, 4179
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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.
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 BS5JPL Sentry1730211011.3e-08-8.01-8.010JPL: "Analysis based on 43 observations spanning .87604 days (2017-Jan-25.50748 to 2017-Jan-26.38352)." Diameter approximately 0.046 km. from mean, weighted H=24.4.
2017 BL3JPL Sentry19002085-2093104.4e-06-2.97-3.090JPL #2 for the day: "Analysis based on 56 observations spanning 4.7625 days (2017-Jan-21.65427 to 2017-Jan-26.41672)." Diameter approximately 0.290 km. from mean, weighted H=20.3.
NEODyS16502072-2106702.53e-06-3.17-3.340NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2017-01-21.655 to 2017-01-25.038."
2010 AU118JPL Sentry03322020-2112381.8e-08-2.73-3.160JPL: "Analysis based on 19 observations spanning 1.3896 days (2010-Jan-13.89477 to 2010-Jan-15.28441)." Diameter approximately 1.900 km. from mean, weighted H=16.2.

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 26 January '17

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

2105Generated Traffic Report
1900Noted that JPL Sentry has updated its 2017 BL3 risk assessment - see above
1730Noted that JPL Sentry has posted 2017 BS5 as an impact risk - see above
1650Noted that JPL Sentry has updated its 2017 BL3 risk assessment - see above
Noted that NEODyS has updated its 2017 BL3 risk assessment - see above
Grabbed MPEC 2017-B65 - Daily Orbit Update - see above
Grabbed MPEC 2017-B66 - 2017 BP5 - see above
Grabbed MPEC 2017-B67 - 2017 BQ5 - see above
Grabbed MPEC 2017-B68 - 2017 BR5 - see above
Grabbed MPEC 2017-B69 - 2017 BS5 - see above
0332Noted that JPL Sentry has reposted 2010 AU118 as an impact risk - see above