Contents  on 1 February '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 1 February '17

Seven objects reported inside ten LD

Seven asteroids are reported to be within ten lunar distances (LD) of our home world today. Nearest is NHATS target 2017 BJ30, which exits Earth's SOI (sphere of gravitational influence), going from 1.55 to 2.67 LD, while intruder 2017 BS32 enters Earth's SOI, sliding in from 4.75 to 2.22 LD. Further away, newly announced 2017 BN92 comes its closest to Earth on this passage -- 4.84 LD at 1523 UTC.

Earth passage I D ~Size Distance Today  Notes
0.13 LD Jan. 302017 BH30 6 m  6.06 to 9.43 LD intruder
0.42 LD tomorrow2017 BS32 14 m  2.22 from 4.75 LD enters Earth SOI, intruder - DOU
1.03 LD Jan. 312017 BJ30 16 m  1.55 to 2.67 LD exits Earth SOI, NHATS target - DOU
2.48 LD Feb. 52017 BG30 4 m  3.58 from 4.14 LD NHATS target - DOU
2.97 LD Jan. 312017 BB7 9 m  3.00 to 3.59 LD NHATS target
4.84 LD today2017 BN92 25 m  4.84 LD NEW, Earth closest at 1523 UTC - MPEC
5.57 LD tomorrow2017 BB6 13 m  5.59 from 6.17 LD
Approaching
4.64 LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, radar/NHATS target - DOU
6.57 LD Feb. 72017 BQ6 182 m  < 10 LD Feb. 4 - DOU
7.10 LD Feb. 52013 FK 78 m  < 10 LD tomorrow
8.64 LD Feb. 52017 BK30 12 m  < 10 LD Feb. 3, risk - DOU

This report was generated at 2212 UTC with the discoveries of 2017 BN92 (MPEC) and already departed 2017 BG92 (MPEC), which flew past us at 1.61 LD on January 19th, and with first follow-up for departed 2017 BR32 and additional observation of inbound intruder 2017 BS32 and outbound risk-listed NHATS target 2017 BJ30 in today's DOU MPEC. The DOU also carries continuing follow-up for inbound NHATS target 2017 BG30, three approaching objects: 2017 BQ6, radar/NHATS target 2017 BW, and risk-listed 2017 BK30, along with four departed objects 2017 BQ30, 2017 BM30, 2017 BY, and NHATS target 2017 AG5, plus distant 136617 1994 CC.



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 in the last ten years but is not presently 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 1 February '17

The MPC's NEO Confirmation Page has 114 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 114 objects listed. Of these, 57 were "one nighters." So far The Tracking News has counted a total of 166 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 1 February '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-C15 - "20:11 UT" - 2017 BN92


<< DOU on 1 Feb. '17 >>  MPEC 2017-C14 - "13:05 UT" - Daily Orbit Update


MPEC 2017-C13 - "12:33 UT" - 2017 BL92


MPEC 2017-C12 - "12:29 UT" - 2017 BK92


MPEC 2017-C11 - "12:24 UT" - 2017 BJ92


MPEC 2017-C10 - "12:20 UT" - 2017 BH92


MPEC 2017-C09 - "12:17 UT" - 2017 BG92


MPEC 2017-C08 - "12:14 UT" - 2017 BF92


MPEC 2017-C07 - "12:10 UT" - 2017 BE92


MPEC 2017-C06 - "11:59 UT" - 2013 TE135


MPEC 2017-C05 - "11:57 UT" - 1999 LW1


MPEC 2017-C04 - "04:48 UT" - 2017 BQ91


MPEC 2017-C03 - "04:45 UT" - 2017 BP91


MPEC 2017-C02 - "04:41 UT" - 2017 BO91


MPEC 2017-C01 - "04:37 UT" - 2017 BN91

Observers  on 1 February '17

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 2 in MPECs 2017-C07 & 2017-C10 -- 2017 BH92, 2017 BE92
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2017-C04, 2017-C11, 2017-C13 & 2017-C14 -- 2017 BZ5, 2017 BT, 2017 BS32, 2017 BQ91, 2017 BQ6, 2017 BQ32, 2017 BP32, 2017 BM3, 2017 BL92, 2017 BL3, 2017 BJ92, 2017 BD29, 2017 AF5, 2016 XD1
T05ATLAS Haleakala in Hawaii, 16 in MPEC 2017-C14 -- 2017 BW, 2016 UU80, 2015 BN509, 2013 GL8, 2003 CR1, 2001 QE34, 54789, 40267, 310842, 153951, 138846, 136635, 11398, 10165, 5131, 4055
V03Big Water Obs. in Utah, 1 in MPEC 2017-C15 -- 2017 BN92
Z84Calar Alto Schmidt in Spain, 4 in MPECs 2017-C11, 2017-C12, 2017-C13 & 2017-C15 -- 2017 BN92, 2017 BL92, 2017 BK92, 2017 BJ92
160Castelmartini Obs. in Italy, 9 in MPEC 2017-C14 -- 2016 LX48, 2014 AD17, 2011 WO41, 2005 TF, 2001 QE34, 25916, 153951, 11398, 1862
703Catalina Sky Survey (CSS) in Arizona, 31 in MPECs 2017-C04 & 2017-C14 -- 2017 BW, 2017 BQ91, 2016 WX9, 2014 AD17, 2011 QP96, 2009 BL2, 2008 CA6, 2003 CR1, 2000 CE59, 90075, 54789, 53319, 480934, 475665, 413002, 385343, 38086, 310842, 22771, 153951, 144411, 138846, 136635, 12538, 11398, 10165, 10150, 5626, 3552, 2329, 1864
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2017-C14 -- 2017 BY, 2017 AH13
Z45Cosmos Obs., 2 in MPEC 2017-C14 -- 2017 BQ6, 2015 BN509
958Dax Obs. in France, 1 in MPEC 2017-C15 -- 2017 BN92
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-C15 -- 2017 BN92
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-C15 -- 2017 BN92
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-C15 -- 2017 BN92
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 4 in MPECs 2017-C04 & 2017-C14 -- 2017 BW, 2017 BQ91, 2017 BL30, 2017 BJ30
W85LCOGT Cerro Tololo A in Chile, 3 in MPEC 2017-C14 -- 2011 EP51, 265482, 192559
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2017-C14 -- 192559
T04LCOGT Haleakala OGG B#2 in Hawaii, 1 in MPEC 2017-C14 -- 2017 BS32
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-C14 -- 2011 EP51
K92LCOGT Sutherland B in South Africa, 2 in MPECs 2017-C05 & 2017-C14 -- 1999 LW1, 192559
K93LCOGT Sutherland C in South Africa, 3 in MPEC 2017-C14 -- 2017 BX32, 2017 BM92, 2011 EP51
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2017-C04, 2017-C07, 2017-C11, 2017-C12, 2017-C13, 2017-C14 & 2017-C15 -- 2017 BQ91, 2017 BP32, 2017 BN92, 2017 BL92, 2017 BK92, 2017 BJ92, 2017 BE92
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-C14 -- 5626
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2017-C06 -- 2013 TE135
568_Marco Micheli on Mauna Kea in Hawaii, 10 in MPECs 2017-C01, 2017-C02, 2017-C05, 2017-C07, 2017-C08, 2017-C09, 2017-C10 & 2017-C14 -- 2017 BO91, 2017 BN91, 2017 BM92, 2017 BJ32, 2017 BH92, 2017 BG92, 2017 BF92, 2017 BF32, 2017 BE92, 1999 LW1
G96Mt. Lemmon Survey (MLS) in Arizona, 39 in MPECs 2017-C11, 2017-C12, 2017-C13 & 2017-C14 -- 2017 BZ6, 2017 BV6, 2017 BO6, 2017 BL92, 2017 BK92, 2017 BK30, 2017 BJ92, 2017 AG5, 2016 YQ8, 2016 WU3, 2016 RG40, 2016 PZ66, 2016 PN38, 2016 LM8, 2015 BG4, 2011 WO41, 2009 BL2, 2005 YV55, 1994 BB, 54789, 469356, 414903, 385343, 380981, 34613, 343098, 315020, 312956, 307070, 267221, 226554, 159923, 155334, 154029, 152742, 136617, 13553, 8507, 1221
408Nyukasa Obs. in Japan, 1 in MPEC 2017-C15 -- 2017 BN92
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-C15 -- 2017 BN92
F51Pan-STARRS 1 (PS1) in Hawaii, 31 in MPECs 2017-C01, 2017-C02, 2017-C03, 2017-C04, 2017-C05, 2017-C07, 2017-C08, 2017-C09, 2017-C10 & 2017-C14 -- 2017 BY, 2017 BW, 2017 BQ91, 2017 BP91, 2017 BO91, 2017 BN91, 2017 BM92, 2017 BM32, 2017 BL32, 2017 BH92, 2017 BG92, 2017 BF92, 2017 BE92, 2017 AT4, 2017 AN20, 2016 WX9, 2013 YT2, 2010 GA34, 2008 BP16, 2007 XF25, 2005 WR54, 2005 EY223, 2004 UB, 1999 LW1, 88213, 457059, 415027, 25916, 136635, 3103, 1916
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2017-C14 -- 2016 YT8, 2016 XD1, 96590, 85804, 54789, 452389, 378610, 326683, 275611, 138846, 137925, 12538, 10115, 5653, 3352
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-C03 & 2017-C15 -- 2017 BP91, 2017 BN92
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-C12 -- 2017 BK92
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2017-C14 -- 2017 BY, 2017 BX5, 2017 BS6, 2017 BQ30, 2017 BM92, 2017 BL30, 2017 BE29, 2017 BD30, 2017 AY13, 2017 AH13, 2017 AC5, 2011 EP51
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2017-C08, 2017-C09, 2017-C10 & 2017-C14 -- 2017 BM92, 2017 BH92, 2017 BG92, 2017 BF92, 1998 QK28
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2017-C14 & 2017-C15 -- 2017 BN92, 85990
I52Steward Obs. Mt. Lemmon Station in Arizona, 18 in MPECs 2017-C03, 2017-C04, 2017-C11, 2017-C12, 2017-C13, 2017-C14 & 2017-C15 -- 2017 BS31, 2017 BR32, 2017 BQ91, 2017 BQ32, 2017 BP91, 2017 BO6, 2017 BO30, 2017 BN92, 2017 BM30, 2017 BL92, 2017 BK92, 2017 BK3, 2017 BJ92, 2017 BJ29, 2017 BH29, 2017 BG30, 2017 BG29, 2017 BD29
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2017-C06 & 2017-C14 -- 2017 BL30, 2017 BK30, 2014 QN266, 2013 TE135
C42Xingming Obs. in China, 1 in MPEC 2017-C15 -- 2017 BN92
J08Zonalunar Obs. in Spain, 1 in MPEC 2017-C15 -- 2017 BN92
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 February '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 BG92NEODyS17302031-2117341.3e-04-5.50-5.790NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2017-01-28.400 to 2017-02-01.270."
JPL Sentry16532031-2116331.3e-04-5.54-5.860JPL: "Analysis based on 9 observations spanning 3.8706 days (2017-Jan-28.39899 to 2017-Feb-01.26964)." Diameter approximately 0.007 km. from mean, weighted H=28.6.
2017 BV32NEODyS16532027-210071.57e-08-4.47-4.660NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2017-01-28.236 to 2017-01-31.132."
2017 BO32NEODyS16532026-21172293.3e-05-4.13-4.430NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2017-01-29.398 to 2017-01-31.187."
2017 BL30JPL Sentry20362029-2058204.6e-04-2.11-2.150JPL #2 for the day: "Analysis based on 48 observations spanning 4.0051 days (2017-Jan-28.37792 to 2017-Feb-01.38299)." Diameter approximately 0.072 km. from mean, weighted H=23.4.
NEODyS16532029-2091312.62e-04-2.34-2.380NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2017-01-28.379 to 2017-01-31.268."
2017 BK30JPL Sentry1730208535.4e-06-6.52-6.730JPL: "Analysis based on 26 observations spanning 5.0010 days (2017-Jan-26.44804 to 2017-Jan-31.449003)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
NEODyS17302085-210644.14e-06-6.64-6.970NEODyS: "Based on 27 optical observations (of which 3 are rejected as outliers) from 2017-01-26.449 to 2017-01-31.450."
2017 BJ30NEODyS1653R E M O V E D-
2017 BE30NEODyS16532096-210053.13e-07-7.20-7.280NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2017-01-27.531 to 2017-01-31.462."
2017 BD6JPL Sentry20362083-209335.2e-07-8.25-8.550JPL: "Analysis based on 14 observations spanning .90464 days (2017-Jan-26.38633 to 2017-Jan-27.29097)." Diameter approximately 0.006 km. from mean, weighted H=28.6.
2014 QN266NEODyS17302078-2117102.54e-06-6.57-6.710NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2014-08-18.456 to 2014-10-29.400."
JPL Sentry16532078-210932.1e-06-6.60-6.660JPL: "Analysis based on 75 observations spanning 71.944 days (2014-Aug-18.45521 to 2014-Oct-29.399567)." Diameter approximately 0.019 km. from mean, weighted H=26.2.
2011 CF66JPL Sentry05162018-21148081.5e-05-6.04-7.180JPL: "Analysis based on 11 observations spanning .17761 days (2011-Feb-13.33976 to 2011-Feb-13.51737)." Diameter approximately 0.010 km. from mean, weighted H=27.8.

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 1 February '17

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

2212Generated Traffic Report
2036Noted that JPL Sentry has updated its 2017 BD6 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
Grabbed MPEC 2017-C15 - 2017 BN92 - see above
1730Noted that NEODyS has updated its 2014 QN266 risk assessment - see above
Noted that NEODyS has posted 2017 BG92 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 BK30 risk assessment - see above
Noted that NEODyS has updated its 2017 BK30 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
1653Noted that JPL Sentry has updated its 2014 QN266 risk assessment - see above
Noted that NEODyS has updated its 2017 BE30 risk assessment - see above
Noted that JPL Sentry has posted 2017 BG92 as an impact risk - see above
Noted that NEODyS has removed 2017 BJ30 as an impact risk - see above
Noted that NEODyS has updated its 2017 BL30 risk assessment - see above
Noted that NEODyS has posted 2017 BO32 as an impact risk - see above
Noted that NEODyS has posted 2017 BV32 as an impact risk - see above
Grabbed MPEC 2017-C05 - 1999 LW1 - see above
Grabbed MPEC 2017-C06 - 2013 TE135 - see above
Grabbed MPEC 2017-C07 - 2017 BE92 - see above
Grabbed MPEC 2017-C08 - 2017 BF92 - see above
Grabbed MPEC 2017-C09 - 2017 BG92 - see above
Grabbed MPEC 2017-C10 - 2017 BH92 - see above
Grabbed MPEC 2017-C11 - 2017 BJ92 - see above
Grabbed MPEC 2017-C12 - 2017 BK92 - see above
Grabbed MPEC 2017-C13 - 2017 BL92 - see above
Grabbed MPEC 2017-C14 - Daily Orbit Update - see above
0516Noted that JPL Sentry has updated its 2011 CF66 risk assessment - see above
Grabbed MPEC 2017-C01 - 2017 BN91 - see above
Grabbed MPEC 2017-C02 - 2017 BO91 - see above
Grabbed MPEC 2017-C03 - 2017 BP91 - see above
Grabbed MPEC 2017-C04 - 2017 BQ91 - see above