Contents  on 10 February '19

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 10 February '19

Five objects reported inside ten LD

There are five asteroidal objects reported within ten lunar distances (LD) of our planet today. The nearest are 2019 CN2, which enters Earth's sphere of gravitational influence, moving in from 2.96 to 1.67 LD, and 2019 CB2 comes its closest this time around, reaching 2.72 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.47 LD tomorrow 2019 CN2 8 m  1.67 from 2.96 LD Feb. 5 - 17 NHATS target, enters Earth SOI
2.72 LD today 2019 CB2 22 m  2.72 LD Feb. 6 - 13 Earth closest at 0119 UTC
4.14 LD Feb. 6 2019 BK4 13 m  9.10 to 10.97 LD Feb. 1 - 10 NHATS target, exits ten LD
7.3   LD Feb. 12* 2017 PV25 41 m  7.6 from 8.0 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target
8.00 LD Feb. 12 2019 CY2 15 m  8.69 from 10.22 LD today - Feb. 14 NEW, enters ten LD, risk - MPEC
Approaching - sorted by 10-LD bubble entry date
3.3   LD Feb. 20* 2019 CY1 26 m  28.4 from 31.5 LD Feb. 17 - 23 EPU +/- 1.60 hours*, risk
7.4   LD Feb. 25* 2019 CJ 25 m  17.7 from 18.8 LD Feb. 19 - March 3 EPU +/- 24 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 2015 UTC with the discoveries of inbound 2019 CY2 (MPEC) and two departed objects: 2019 CA3 (MPEC), which went by us at about 4.8 LD* on February 3rd, and 2019 CZ2 (MPEC), passing at around 4.5 LD* on January 31st. Today's DOU MPEC has follow-up for departed 2019 CV1.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 10 February '19

The MPC's NEO Confirmation Page has 77 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 77 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 99 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 10 February '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-C107 - "16:03 UT" - 2019 CF3


MPEC 2019-C106 - "15:59 UT" - 2019 CE3


MPEC 2019-C105 - "15:54 UT" - 2019 CD3


MPEC 2019-C104 - "15:50 UT" - 2019 CC3


MPEC 2019-C103 - "15:45 UT" - 2019 CB3


MPEC 2019-C102 - "15:40 UT" - 2019 CA3


MPEC 2019-C101 - "15:35 UT" - 2019 CZ2


<< DOU on 10 Feb. '19 >>  MPEC 2019-C100 - "13:06 UT" - Daily Orbit Update


MPEC 2019-C99 - "03:26 UT" - 2018 AY18


MPEC 2019-C98 - "03:22 UT" - 2018 AX18


MPEC 2019-C97 - "03:19 UT" - 2017 WH30


MPEC 2019-C96 - "03:15 UT" - 2017 SN132


MPEC 2019-C95 - "03:11 UT" - 2017 OG69


MPEC 2019-C94 - "02:43 UT" - 2019 CW2


MPEC 2019-C93 - "02:39 UT" - 2019 CY2


MPEC 2019-C92 - "02:35 UT" - 2019 CX2


MPEC 2019-C91 - "02:31 UT" - 2019 CV2


MPEC 2019-C90 - "02:27 UT" - 2019 CU2


MPEC 2019-C89 - "02:21 UT" - 2019 CT2


MPEC 2019-C88 - "01:14 UT" - Retraction of 2019 CO2


MPEC 2019-C87 - "00:19 UT" - 2019 CR


MPEC 2019-C86 - "00:02 UT" - 2016 RR33

Observers  on 10 February '19

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-C101 -- 2019 CZ2
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2019-C90, 2019-C94, 2019-C102, 2019-C103, 2019-C104 & 2019-C107 -- 2019 CW2, 2019 CU2, 2019 CF3, 2019 CC3, 2019 CB3, 2019 CA3
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-C101 -- 2019 CZ2
V03Big Water Obs. in Utah, 2 in MPECs 2019-C105 & 2019-C106 -- 2019 CE3, 2019 CD3
160Castelmartini Obs. in Italy, 1 in MPEC 2019-C100 -- 2012 BC124
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2019-C93 & 2019-C105 -- 2019 CY2, 2019 CD3
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPECs 2019-C89, 2019-C91, 2019-C100 & 2019-C103 -- 2019 CV2, 2019 CT2, 2019 CB3, 2018 XE5
807.Scott Sheppard via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-C97 -- 2017 WH30
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2019-C89, 2019-C90, 2019-C91 & 2019-C94 -- 2019 CW2, 2019 CV2, 2019 CU2, 2019 CT2
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-C106 -- 2019 CE3
G37Discovery Channel Telescope (DCT) in Arizona, 2 in MPECs 2019-C95 & 2019-C97 -- 2017 WH30, 2017 OG69
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2019-C91 & 2019-C92 -- 2019 CX2, 2019 CV2
304Las Campanas Obs. in Chile, 5 in MPECs 2019-C95, 2019-C96, 2019-C97, 2019-C98 & 2019-C99 -- 2018 AY18, 2018 AX18, 2017 WH30, 2017 SN132, 2017 OG69
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2019-C93, 2019-C102, 2019-C103, 2019-C104, 2019-C105 & 2019-C107 -- 2019 CY2, 2019 CF3, 2019 CD3, 2019 CC3, 2019 CB3, 2019 CA3
5685Scott Sheppard on Mauna Kea in Hawaii, 4 in MPECs 2019-C95, 2019-C96, 2019-C98 & 2019-C99 -- 2018 AY18, 2018 AX18, 2017 SN132, 2017 OG69
568^R. Wainscoat on Mauna Kea in Hawaii, 4 in MPECs 2019-C89, 2019-C90, 2019-C92 & 2019-C94 -- 2019 CX2, 2019 CW2, 2019 CU2, 2019 CT2
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-C92 -- 2019 CX2
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2019-C102, 2019-C103, 2019-C104, 2019-C106 & 2019-C107 -- 2019 CF3, 2019 CE3, 2019 CC3, 2019 CB3, 2019 CA3
F51Pan-STARRS 1 (PS1) in Hawaii, 9 in MPECs 2019-C87, 2019-C89, 2019-C90, 2019-C91, 2019-C92, 2019-C94, 2019-C100, 2019-C105 & 2019-C107 -- 2019 CX2, 2019 CW2, 2019 CV2, 2019 CU2, 2019 CU1, 2019 CT2, 2019 CR, 2019 CF3, 2019 CD3
323Perth Obs. in Western Australia, 1 in MPEC 2019-C100 -- 2012 OP4
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2019-C93 & 2019-C106 -- 2019 CY2, 2019 CE3
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2019-C91, 2019-C92 & 2019-C94 -- 2019 CX2, 2019 CW2, 2019 CV2
I52Steward Obs. Mt. Lemmon Station in Arizona, 17 in MPECs 2019-C93, 2019-C100, 2019-C102, 2019-C103, 2019-C104, 2019-C105, 2019-C106 & 2019-C107 -- 2019 CY2, 2019 CX1, 2019 CV1, 2019 CJ1, 2019 CF3, 2019 CE3, 2019 CD3, 2019 CC3, 2019 CB3, 2019 CA3, 2019 BT3, 2019 BQ3, 2019 BK, 2019 BG1, 2019 AV4, 2019 AS9, 2019 AP6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-C86 -- 2016 RR33
L01Visnjan Obs., 3 in MPECs 2019-C93, 2019-C105 & 2019-C106 -- 2019 CY2, 2019 CE3, 2019 CD3
C51WISE in Earth polar orbit, 1 in MPEC 2019-C100 -- 1943
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 February '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL 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
2019 CY2JPL Sentry04552029-202923.981e-08-7.48-7.700JPL: Computed at 19:56 Feb. 9th Pacific time based on 16 observations spanning .78102 days (2019-Feb-08.30396 to 2019-Feb-09.08498). Diameter approximately 0.015 km. from weighted mean H=26.74.

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 10 February '19

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

2015Generated Traffic Report
1850Grabbed MPEC 2019-C100 - Daily Orbit Update - see above
Grabbed MPEC 2019-C101 - 2019 CZ2 - see above
Grabbed MPEC 2019-C102 - 2019 CA3 - see above
Grabbed MPEC 2019-C103 - 2019 CB3 - see above
Grabbed MPEC 2019-C104 - 2019 CC3 - see above
Grabbed MPEC 2019-C105 - 2019 CD3 - see above
Grabbed MPEC 2019-C106 - 2019 CE3 - see above
Grabbed MPEC 2019-C107 - 2019 CF3 - see above
0455Noted that JPL Sentry has posted 2019 CY2 as an impact risk - see above
Grabbed MPEC 2019-C88 - Retraction of 2019 CO2 - see above
Grabbed MPEC 2019-C89 - 2019 CT2 - see above
Grabbed MPEC 2019-C90 - 2019 CU2 - see above
Grabbed MPEC 2019-C91 - 2019 CV2 - see above
Grabbed MPEC 2019-C92 - 2019 CX2 - see above
Grabbed MPEC 2019-C93 - 2019 CY2 - see above
Grabbed MPEC 2019-C94 - 2019 CW2 - see above
Grabbed MPEC 2019-C95 - 2017 OG69 - see above
Grabbed MPEC 2019-C96 - 2017 SN132 - see above
Grabbed MPEC 2019-C97 - 2017 WH30 - see above
Grabbed MPEC 2019-C98 - 2018 AX18 - see above
Grabbed MPEC 2019-C99 - 2018 AY18 - see above
0102Grabbed MPEC 2019-C87 - 2019 CR - see above
0018Grabbed MPEC 2019-C86 - 2016 RR33 - see above