Contents  on 28 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 28 January '17

Four objects reported inside ten LD

Four asteroids are reported traveling within ten lunar distances (LD) of our home world today. Nearest is intruder and NHATS target 2017 BX, which is outbound from 4.63 to 6.25 LD, and newest discovery 2017 BB7, inbound from 6.72 to 5.32 LD. Much further out, newly discovered 2017 BA7 exits the ten LD space, moving away from 8.31 to 12.55 LD. It buzzed the Moon at 0.73 LD three days ago and the Earth at 1.12 LD the following day.

Coming towards us next, 2017 BB6 slides inside ten LD tomorrow. Among three others known to be on approach is newly announced 2017 BQ6, which enters on February 4th.

Earth passage I D ~Size Distance Today  Notes
0.69 LD Jan. 252017 BX 9 m  4.63 to 6.25 LD intruder, NHATS target
1.12 LD Jan. 262017 BA7 10 m  8.31 to 12.55 LD NEW, Moon buzzer, exits ten LD - MPEC
1.98 LD Jan. 242017 BD6 6 m  7.72 to 9.74 LD risk
2.97 LD Jan. 312017 BB7 8 m  5.32 from 6.72 LD NEW - MPEC
Approaching
4.63 LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, radar/NHATS target - DOU
5.57 LD Feb. 22017 BB6 12 m  < 10 LD tomorrow
6.56 LD Feb. 72017 BQ6 190 m  < 10 LD Feb. 4, NEW - MPEC, DOU
7.10 LD Feb. 52013 FK 78 m  < 10 LD Feb. 2

This report was generated at 2255 UTC with the discoveries of 2017 BB7 (MPEC), 2017 BA7 (MPEC), 2017 BQ6 (MPEC, DOU), and two objects that have already departed: 2017 BR6 (MPEC), which passed us at 4.78 LD on January 23rd, and 2017 BN6 (MPEC), which also on the 23rd flew by us at 1.66 LD and the Moon at 2.39 LD. Today's DOU MPEC has follow-up for approaching 2017 BW, departed NHATS target 2017 AG5, and distant 136617 1994 CC, and follow-up adding 17 to 20 days to short (3- to 6-day) observing arcs for three departed objects: 2017 AK13, 2017 AE3, and risk-listed 2017 AP4.
        We also note that risk-listed NHATS target 2005 VL1, which had been listed here for awhile as approaching our ten-LD traffic reporting zone, is now known to be coming not quite so close, but rather will fly past at 11.41 LD on February 3rd. Its recovery was announced early today (MPEC) and there is additional observation in the DOU.



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 28 January '17

The MPC's NEO Confirmation Page has 127 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 127 objects listed. Of these, 84 were "one nighters." So far The Tracking News has counted a total of 155 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 28 January '17

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been nineteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 28 Jan. '17 >>  MPEC 2017-B102 - "13:56 UT" - Daily Orbit Update


MPEC 2017-B101 - "13:40 UT" - 2017 BB7


MPEC 2017-B100 - "13:37 UT" - 2017 BA7


MPEC 2017-B99 - "13:35 UT" - 2017 BZ6


MPEC 2017-B98 - "13:32 UT" - 2017 BY6


MPEC 2017-B97 - "13:29 UT" - 2017 BX6


MPEC 2017-B96 - "13:27 UT" - 2017 BW6


MPEC 2017-B95 - "13:24 UT" - 2017 BV6


MPEC 2017-B94 - "13:21 UT" - 2017 BU6


MPEC 2017-B93 - "13:18 UT" - 2017 BT6


MPEC 2017-B92 - "13:15 UT" - 2017 BS6


MPEC 2017-B91 - "13:13 UT" - 2017 BR6


MPEC 2017-B90 - "13:09 UT" - 2017 BQ6


MPEC 2017-B89 - "13:06 UT" - 2017 BP6


MPEC 2017-B88 - "13:03 UT" - 2017 BO6


MPEC 2017-B87 - "12:59 UT" - 2017 BN6


MPEC 2017-B86 - "12:56 UT" - 2017 BM6


MPEC 2017-B85 - "12:52 UT" - 2017 BL6


MPEC 2017-B84 - "01:22 UT" - 2005 VL1

Observers  on 28 January '17

A total of 49 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-B90 -- 2017 BQ6
T05ATLAS Haleakala in Hawaii, 16 in MPECs 2017-B90 & 2017-B102 -- 2017 BQ6, 2015 BN509, 2014 AD17, 2001 QE34, 90075, 54789, 310842, 153951, 136635, 12538, 11398, 7088, 5131, 3352, 887, 433
V03Big Water Obs. in Utah, 1 in MPEC 2017-B102 -- 34613
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-B90 -- 2017 BQ6
160Castelmartini Obs. in Italy, 6 in MPEC 2017-B102 -- 479325, 24445, 171819, 162269, 137032, 5587
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-B102 -- 2017 BZ5
K51Celado Obs. in Italy, 11 in MPECs 2017-B84, 2017-B86, 2017-B88, 2017-B89, 2017-B90, 2017-B91, 2017-B93, 2017-B94, 2017-B95, 2017-B97 & 2017-B99 -- 2017 BZ6, 2017 BX6, 2017 BV6, 2017 BU6, 2017 BT6, 2017 BR6, 2017 BQ6, 2017 BP6, 2017 BO6, 2017 BM6, 2005 VL1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-B102 -- 2016 YM1
G58Chabot Obs. in northern California, 2 in MPEC 2017-B102 -- 2017 BW, 2017 BU
113Drebach Obs. in Germany, 1 in MPEC 2017-B90 -- 2017 BQ6
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 11 in MPECs 2017-B84, 2017-B88, 2017-B91, 2017-B99, 2017-B100 & 2017-B102 -- 2017 BZ6, 2017 BR6, 2017 BO6, 2017 BA7, 2016 YO3, 2016 VZ18, 2016 UY40, 2016 UL5, 2015 FD35, 2011 EP51, 2005 VL1
K88GINOP-KHK in Hungary, 18 in MPECs 2017-B84, 2017-B85, 2017-B86, 2017-B87, 2017-B88, 2017-B89, 2017-B90, 2017-B91, 2017-B92, 2017-B93, 2017-B94, 2017-B95, 2017-B97, 2017-B98, 2017-B99, 2017-B100, 2017-B101 & 2017-B102 -- 2017 BZ6, 2017 BY6, 2017 BX6, 2017 BW, 2017 BV6, 2017 BU6, 2017 BT6, 2017 BS6, 2017 BR6, 2017 BQ6, 2017 BP6, 2017 BO6, 2017 BN6, 2017 BM6, 2017 BL6, 2017 BB7, 2017 BA7, 2005 VL1
J95Great Shefford Obs. in England, 1 in MPEC 2017-B93 -- 2017 BT6
C43Hoyerswerda Obs. in Germany, 3 in MPECs 2017-B90, 2017-B93 & 2017-B102 -- 2017 BZ5, 2017 BT6, 2017 BQ6
B15Inastars Obs. in Germany, 1 in MPEC 2017-B93 -- 2017 BT6
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-B102 -- 326683
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2017-B90, 2017-B100 & 2017-B102 -- 2017 BW, 2017 BQ6, 2017 BA7
246KLENOT in the Czech Republic, 9 in MPECs 2017-B84, 2017-B85, 2017-B90, 2017-B93, 2017-B97, 2017-B100 & 2017-B102 -- 2017 BX6, 2017 BT6, 2017 BQ6, 2017 BO3, 2017 BL6, 2017 BL3, 2017 BA7, 2017 AZ13, 2005 VL1
046Klet Obs. in the Czech Republic, 1 in MPEC 2017-B90 -- 2017 BQ6
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2017-B102 -- 463360
W85LCOGT Cerro Tololo A in Chile, 2 in MPEC 2017-B102 -- 265482, 192559
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2017-B102 -- 192559
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-B102 -- 265482
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-B92 -- 2017 BS6
K92LCOGT Sutherland B in South Africa, 2 in MPEC 2017-B102 -- 2017 BX5, 192559
K93LCOGT Sutherland C in South Africa, 2 in MPECs 2017-B91 & 2017-B102 -- 2017 BR6, 192559
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2017-B85, 2017-B86, 2017-B87, 2017-B98 & 2017-B99 -- 2017 BZ6, 2017 BY6, 2017 BN6, 2017 BM6, 2017 BL6
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-B96 & 2017-B102 -- 2017 BW6, 2017 BQ5, 2017 BP5
900Moriyama Obs. in Japan, 1 in MPEC 2017-B102 -- 2017 BQ6
474Mt. John Obs. in New Zealand, 14 in MPECs 2017-B85, 2017-B90 & 2017-B102 -- 2017 BS, 2017 BQ6, 2017 BL6, 2017 AX3, 2017 AQ19, 2017 AP13, 2017 AC5, 2016 YX7, 2016 YP4, 2016 YJ4, 2016 YF8, 2015 BX310, 2014 QC3, 1998 WL4
G96Mt. Lemmon Survey (MLS) in Arizona, 26 in MPECs 2017-B84, 2017-B88, 2017-B89, 2017-B93, 2017-B94, 2017-B95, 2017-B97, 2017-B98, 2017-B99, 2017-B100 & 2017-B102 -- 2017 BZ6, 2017 BY6, 2017 BX6, 2017 BV6, 2017 BU6, 2017 BT6, 2017 BP6, 2017 BO6, 2017 BA7, 2017 AK13, 2017 AG5, 2017 AF5, 2016 VV3, 2016 VQ5, 2010 CM44, 2005 VL1, 85275, 481904, 307070, 267221, 25916, 232382, 152560, 136617, 5693, 1862
Z80Northolt Branch Obs. in England, 2 in MPEC 2017-B102 -- 96590, 152931
G34Oberfrauendorf Obs. in Germany, 3 in MPECs 2017-B90 & 2017-B102 -- 2017 BQ6, 138846, 4179
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2017-B102 -- 2006 WS1, 2001 QE34
F51Pan-STARRS 1 (PS1) in Hawaii, 26 in MPECs 2017-B87, 2017-B89, 2017-B91, 2017-B92, 2017-B96, 2017-B100, 2017-B101 & 2017-B102 -- 2017 BW6, 2017 BS6, 2017 BR6, 2017 BP6, 2017 BN6, 2017 BH3, 2017 BB7, 2017 BA7, 2017 AN20, 2016 YQ8, 2015 BO509, 2014 KZ45, 2013 GL8, 2011 CH50, 2008 MU1, 2005 YV55, 386298, 382406, 330809, 276703, 267221, 171576, 152679, 152560, 9172, 3552
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 28 in MPEC 2017-B102 -- 2017 BW, 2017 BM3, 2017 BL3, 2017 AG5, 2017 AF5, 2016 YN4, 2016 XD1, 2016 UU80, 2016 QN11, 2016 PR8, 2016 LM8, 2014 EW24, 2014 AD17, 2011 WO41, 2006 OH15, 2005 TF, 2001 QE34, 481904, 438955, 349507, 326683, 275611, 22753, 226198, 203471, 138846, 13651, 4179
L04ROASTERR-1 in Romania, 1 in MPEC 2017-B93 -- 2017 BT6
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-B84, 2017-B90 & 2017-B100 -- 2017 BQ6, 2017 BA7, 2005 VL1
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-B90 & 2017-B93 -- 2017 BT6, 2017 BQ6
Q11Shinshiro Obs., 1 in MPEC 2017-B102 -- 11398
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B102 -- 2017 BL3
G40%program code "%" (14) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-B90 -- 2017 BQ6
G45Space Surveillance Telescope Atom Site (SST Atom Site) in New Mexico, 31 in MPECs 2017-B85, 2017-B86, 2017-B87, 2017-B90, 2017-B94, 2017-B97 & 2017-B102 -- 2017 BX6, 2017 BU6, 2017 BQ6, 2017 BN6, 2017 BM6, 2017 BL6, 2017 AZ13, 2017 AO13, 2016 WX9, 2016 VQ5, 2013 GL8, 2011 WO41, 2011 QP96, 2010 CM44, 2008 CM20, 2008 CE5, 90075, 481904, 438955, 413002, 370702, 370307, 36017, 25916, 226198, 203471, 153951, 141018, 11398, 10165, 1916
691Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2017-B85, 2017-B92, 2017-B94, 2017-B98 & 2017-B102 -- 2017 BY6, 2017 BU6, 2017 BS6, 2017 BL6, 2017 AE3, 2016 WS9, 2016 TY92, 2016 PZ66, 2005 ML13, 2003 EZ16, 2000 CE59
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-B96 & 2017-B102 -- 2017 BW6, 2017 BF3, 2017 AT4, 2017 AB17, 2016 WC7, 2016 VR5, 2016 KB4, 2015 XY378
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2017-B90 & 2017-B102 -- 2017 BQ6, 1862
926Tenagra II Obs. in Arizona, 15 in MPECs 2017-B85, 2017-B86, 2017-B87, 2017-B88, 2017-B89, 2017-B90, 2017-B92, 2017-B93, 2017-B94, 2017-B95, 2017-B97, 2017-B98, 2017-B99, 2017-B100 & 2017-B101 -- 2017 BZ6, 2017 BY6, 2017 BX6, 2017 BV6, 2017 BU6, 2017 BT6, 2017 BS6, 2017 BQ6, 2017 BP6, 2017 BO6, 2017 BN6, 2017 BM6, 2017 BL6, 2017 BB7, 2017 BA7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2017-B102 -- 2017 AP4, 2016 TY92, 2016 RO1, 2016 RG40
718Wiggins Obs. in Utah, 1 in MPEC 2017-B90 -- 2017 BQ6
C51WISE in Earth polar orbit, 3 in MPEC 2017-B102 -- 469513, 345646, 152563
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 January '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 BD6NEODyS17172083-210274.93e-06-7.29-7.630NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2017-01-26.387 to 2017-01-27.292."
2017 AP4JPL Sentry1830R E M O V E DJPL: Risk listing removed at 1806 UTC.
2017 AK3NEODyS1717208116.52e-09-8.16-8.160NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2017-01-02.469 to 2017-01-26.662."
2016 TB57NEODyS17172096-2116114.8e-06-6.33-6.510NEODyS: "Based on 119 optical observations (of which 2 are rejected as outliers) from 2016-09-12.527 to 2017-01-25.645."
2005 VL1NEODyS1717210813.25e-08-8.54-8.540NEODyS: "Based on 63 optical observations (of which 2 are rejected as outliers) from 2005-11-04.332 to 2017-01-27.996."
JPL Sentry0503R E M O V E DJPL: Risk listing removed at 0351 UTC.

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 28 January '17

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

2255Generated Traffic Report
1830Noted that JPL Sentry has removed 2017 AP4 as an impact risk - see above
1717Noted that NEODyS has updated its 2005 VL1 risk assessment - see above
Noted that NEODyS has updated its 2016 TB57 risk assessment - see above
Noted that NEODyS has updated its 2017 AK3 risk assessment - see above
Noted that NEODyS has posted 2017 BD6 as an impact risk - see above
Grabbed MPEC 2017-B85 - 2017 BL6 - see above
Grabbed MPEC 2017-B86 - 2017 BM6 - see above
Grabbed MPEC 2017-B87 - 2017 BN6 - see above
Grabbed MPEC 2017-B88 - 2017 BO6 - see above
Grabbed MPEC 2017-B89 - 2017 BP6 - see above
Grabbed MPEC 2017-B90 - 2017 BQ6 - see above
Grabbed MPEC 2017-B91 - 2017 BR6 - see above
Grabbed MPEC 2017-B92 - 2017 BS6 - see above
Grabbed MPEC 2017-B93 - 2017 BT6 - see above
Grabbed MPEC 2017-B94 - 2017 BU6 - see above
Grabbed MPEC 2017-B95 - 2017 BV6 - see above
Grabbed MPEC 2017-B96 - 2017 BW6 - see above
Grabbed MPEC 2017-B97 - 2017 BX6 - see above
Grabbed MPEC 2017-B98 - 2017 BY6 - see above
Grabbed MPEC 2017-B99 - 2017 BZ6 - see above
Grabbed MPEC 2017-B100 - 2017 BA7 - see above
Grabbed MPEC 2017-B101 - 2017 BB7 - see above
Grabbed MPEC 2017-B102 - Daily Orbit Update - see above
0503Noted that JPL Sentry has removed 2005 VL1 as an impact risk - see above
0123Grabbed MPEC 2017-B84 - 2005 VL1 - see above