Last updated 22 Aug 2021

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Ephemerides and observability details for unnumbered Great Shefford Observatory Minor Planet potential discoveries

This page links directly to the Minor Planet Center's Ephemeris Service to provide up to date positions of all the objects listed below, to aid observers in getting astrometric positions of the objects that have been discovered at Great Shefford. See also the Discovery Circumstances page of all numbered and unnumbered objects.

Other observers also have their own follow-up pages, check out this list of links.

A PDF document describing the use of the MPES is available.

Information on any known problems with this service is available.


Astrometric observations of any of the following objects should be sent directly to obs@cfa.harvard.edu. Updated orbits will be available automatically through this page.

Display ephemerides or summary
Discovery circumstances (in order of discovery) can be found here.

Objects are listed in order of increasing distance east of the Sun (i.e. from evening sky objects through to morning objects) and currently observable objects (near opposition) will generally be found near the middle of the listing.

Information compiled 18 Sep 2021 from MPC MPES Ephemeris Summary and 1-line orbital elements. Opposition dates, RA, Decl., Magnitudes and Elongations are approximate.

Opp. Date Object RA Decl. Mag. Elong. Last Observed No. of opps U Further Observations? Orbit
Rows in Green denote objects in need of observation, with elongations of 90 or more and mag +21.5 or brighter and observed within the last month and useful for orbit improvement or numbering.
Rows in Red denote objects in need of observation, with elongations of 90 or more and mag +21.5 or brighter but not observed within the last month and useful for orbit improvement or numbering.
30/04/2022 2008 YT24 11 53 +02.1 23.5 2 27/10/2019 4 1 Not necessary for numbering. 4 opps, 2004-2019, MPO 543397
15/06/2022 2008 UE99 13 11 -07.8 23.9 24 31/01/2017 5 1 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 5 opps, 2005-2017, MPO 409349
31/05/2022 2005 EE1 13 17 -18.0 22.6 31 08/04/2005 1 6 Not necessary for numbering. 37-day arc, MPEC 2020-M39
20/06/2022 2007 XS16 13 32 -08.2 23.5 29 23/01/2020 5 2 Useful for orbit improvement (based on orbit uncertainty). Not necessary for numbering. 5 opps, 2003-2020, MPO 543261
10/07/2022 2007 YL2 14 18 -10.3 24.0 41 14/04/2021 6 1 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 6 opps, 2003-2021, MPO 623526
24/07/2022 2005 UA7 14 59 -20.2 23.0 53 17/05/2021 7 0 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 7 opps, 2001-2021, MPO 639908
12/10/2022 2011 SV25 16 39 -23.3 24.1 76 22/03/2020 6 0 Useful for orbit improvement (based on orbit uncertainty). Not necessary for numbering. 6 opps, 2004-2020, MPO 543714
04/11/2022 2009 CL6 = 2011 UK42 17 31 -31.1 22.8 88 24/03/2020 9 0 Useful for orbit improvement (based on orbit uncertainty). Not necessary for numbering. 9 opps, 2007-2020, MPO 543738
04/11/2022 2012 CJ2 17 52 -23.3 23.3 93 16/03/2020 7 0 Useful for numbering. 7 opps, 2003-2020, MPO 543797
04/01/2023 2008 WH2 19 47 -05.3 21.2 121 02/08/2021 5 0 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 5 opps, 2008-2021, MPO 640108
02/01/2023 2006 GQ3 21 57 -13.6 22.1 151 12/09/2021 6 0 Useful for orbit improvement (based on orbit uncertainty). Not necessary this month for numbering. 6 opps, 2006-2021, MPEC 2021-S06
22/12/2022 2009 HW58 = 2017 QA19 23 30 +01.8 21.3 175 10/09/2021 7 0 Not necessary this month for numbering. 7 opps, 2005-2021, MPEC 2021-RW5
29/11/2022 2020 FD7 23 32 -27.1 22.0 155 18/04/2020 1 5 Not necessary for numbering. 24-day arc, MPEC 2020-HD8
20/09/2021 2012 FW1 23 47 -01.3 22.2 179 18/04/2012 1   Useful for numbering. 51-day arc, MPO 230289
24/10/2021 2013 YX35 02 13 +14.1 21.3 140 09/12/2017 2 3 Not necessary for numbering. 2 opps, 2013-2017, MPO 485660
29/10/2021 2012 HB12 02 42 -03.7 21.1 135 04/09/2021 11 0 Not necessary for orbit improvement. Not necessary this month for numbering. 11 opps, 2004-2021, MPEC 2021-R80
05/11/2021 2010 TO5 02 58 +09.0 20.6 130 17/09/2021 10 0 Not necessary this month for numbering. 10 opps, 2003-2021, MPC xxxxx
21/11/2021 2009 AO1 04 10 +31.2 22.2 109 23/08/2020 6 0 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 6 opps, 2009-2020, MPO 562179
22/11/2021 2007 EA183 04 13 +15.5 23.0 111 29/07/2019 5 0 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 5 opps, 2007-2019, MPO 477579
21/11/2021 2009 TQ2 04 15 +22.6 21.2 110 15/08/2021 10 0 Useful for orbit improvement (based on orbit uncertainty). Useful for numbering. 10 opps, 2002-2021, MPEC 2021-Q62
18/12/2021 2007 XT16 05 46 +25.3 22.9 89 13/09/2020 6 0 Not necessary for numbering. 6 opps, 2007-2020, MPEC 2020-UQ6
22/12/2021 2009 AN1 05 53 +18.8 22.9 87 06/01/2009 1 E Useful for numbering. 4-day arc, MPO 151128
23/12/2021 2017 DH110 06 06 +12.1 23.2 84 27/02/2017 4 1 Not necessary for numbering. 4 opps, 2001-2017, MPO 492159
26/12/2021 2008 TR156 06 16 +36.7 22.0 82 05/11/2020 5 1 Not necessary for numbering. 5 opps, 2008-2020, MPEC 2020-V16
23/12/2021 2004 PO95 06 24 +42.2 23.7 81 26/08/2004 1   Useful for numbering. 16-day arc, MPO 104306
29/12/2021 2011 SP232 06 25 +23.9 21.8 80 08/11/2020 12 0 Not necessary for numbering. 12 opps, 1995-2020, MPEC 2020-V46
07/01/2022 2012 FX1 06 46 +22.2 23.7 75 10/04/2019 3 2 Useful for numbering. 3 opps, 2012-2019, MPO 640306
20/01/2022 2006 XY4 07 35 +25.4 22.5 64 13/11/2020 7 0 Not necessary for numbering. 7 opps, 1996-2020, MPEC 2020-VE3
19/01/2022 2007 RA12 07 37 +18.2 23.4 63 05/11/2020 8 0 Not necessary for numbering. 8 opps, 1994-2020, MPEC 2020-V16
01/02/2022 2012 XH54 07 59 +20.9 22.4 58 30/08/2016 3 2 Not necessary for numbering. 3 opps, 2009-2016, MPO 640350
03/02/2022 2009 VJ42 08 11 +10.9 23.1 53 16/10/2020 3 2 Not necessary for numbering. 3 opps, 2009-2020, MPEC 2020-U37
05/02/2022 2012 RP9 08 24 +31.8 23.3 55 12/09/2020 4 2 Not necessary for numbering. 4 opps, 2008-2020, MPO 562384
08/02/2022 2008 TG9 08 46 +10.7 22.5 45 10/12/2020 9 0 Useful for orbit improvement (based on orbit uncertainty). Not necessary for numbering. 9 opps, 2003-2020, MPO 599101
09/02/2022 2015 XV218 08 48 +02.3 23.3 44 09/12/2015 1   Useful for numbering. 5-day arc, MPO 392478
22/02/2022 2012 XL2 08 58 +19.0 23.0 44 12/12/2020 10 0 Not necessary for orbit improvement. Not necessary for numbering. 10 opps, 1995-2020, MPO 599402
23/02/2022 2007 XY17 09 11 +10.0 22.7 39 14/11/2020 3 1 Not necessary for numbering. 3 opps, 2007-2020, MPEC 2020-VF7
14/02/2022 2016 QP45 09 11 +21.5 24.6 42 15/12/2020 2 0 Not necessary for numbering. 2 opps, 2016-2020, MPO 599984
25/02/2022 2005 WU57 09 34 +09.9 22.6 33 11/01/2021 5 2 Not necessary for numbering. 5 opps, 2005-2021, MPO 598928
06/03/2022 2015 TN23 10 09 +03.2 24.3 23 24/10/2019 3 1 Not necessary for numbering. 3 opps, 2002-2019, MPO 544622
30/04/2022 2016 VY11 11 42 +03.6 23.5 2 18/11/2016 1 6 Not necessary for numbering. 23-day arc, MPEC 2020-HD8

 


Options:

By default, ephemerides are topocentric for Great Shefford, begin now and are for 12 hours at 1 hour intervals and suppress output when the object is unobservable.

Start date for ephemerides: Number of dates to output

Ephemeris interval: Ephemeris units: days hours minutes seconds

For daily ephemerides, enter desired offset from 0h UT: hours

Observatory code:

Display positions in: truncated sexagesimal or full sexagesimal or decimal units

Display motions as: "/sec "/min "/hr °/day

Total motion and direction Separate R.A. and Decl. sky motions Separate R.A. and Decl. coordinate motions

Suppress output if sun above local horizon

Suppress output if object below local horizon

Generate perturbed ephemerides for unperturbed orbits

Measure azimuths:

westwards from the south meridian

eastwards from the north meridian

Also display elements for epoch

Format for elements output:

none MPC 1-line MPC 8-line
SkyMap (SkyMap Software) Guide (Project Pluto) xephem (E. Downey)
Home Planet (J. Walker) MyStars! (Relative Data Products) TheSky (Software Bisque)
Starry Night (Sienna Software) Deep Space (D. S. Chandler) PC-TCS (D. Harvey)
Earth Centered Universe (Nova Astronomics) Dance of the Planets (ARC) MegaStar V4.x (E.L.B. Software)
SkyChart 2000.0 (Southern Stars Software) Voyager II (Carina Software) SkyTools (CapellaSoft)
Autostar (Meade Instruments)

If you select 8-line MPC format, you may display the residual block for the objects selected:

Show residuals blocks. Show only residual lines containing observations from code . If you select 8-line MPC format the elements will be displayed with the ephemerides. If you select any format other than 8-line MPC format, only the elements are returned. In such cases your browser should download the elements file and save it to your local disk.


Supplementary Information

Summary
The summary lists the current J2000.0 coordinates, visual magnitude and solar elongation of the selected minor planets, as well as information on the date of last observation (where available), forthcoming opposition data and details on the latest published orbit. The opposition data lists the date of the next opposition and the declination and visual magnitude at that time.

Formats
The list of available formats for the orbital elements was correct at the time this document was prepared. It is possible that the Minor Planet Center now supports futher formats. If you select the summary option, any newly supported formats will be listed.

Elements
The elements supplied are the latest published elements for the specified objects. Elements will be found even if the designation you enter is a non-principal designation in an identification or if the object has been numbered.

Ephemerides can be supplied for objects with only Väisälä elements, but the elements themselves are not supplied.

Ephemerides
The ephemerides supplied for minor planets and comets are perturbed (if the orbits were computed with perturbations) and can be generated over the time period 1900 to 2040. Objects with unperturbed orbit solutions will return unperturbed ephemerides. Objects must be identified in images by their motion, not by their apparent closeness to a predicted position.

The time-scale of the supplied ephemerides is UTC.

If you desire a topocentric ephemeris, enter your observatory code in the appropriate box. When local circumstances are displayed, the azimuths are reckoned westwards from the south meridian.

As an aide-mémoire, the packed form of the object's designation (as used on the astrometric observation record) is displayed immediately above the ephemeris.


This service utilises the Minor Planet Ephemeris Service, courtesy of the IAU's Minor Planet Center. It has been made possible by Process Software Corporation, and their excellent VMS Web server, Purveyor.

The calculations will be performed on the Tamkin Foundation Computing Network.


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