• MPC Preparation (Info)

    • The Possible Comet (and A/ objects) Confirmation Page

    Please ensure you are familiar with the notes at the bottom of this page.
    Also, additional notes on the NEOCP and information on how we remove objects on the NEOCP are also available here.

    The objects listed on this page may be comets. All reports of new cometary activity should be made using the following web form (Reports of activity for known comets made to the above web form will be ignored.) New reports of cometary activity must be made using this web form in order to be considered for inclusion in any resulting MPEC announcing cometary status.

    IF YOU DO NOT DETECT CLEAR COMETARY ACTIVITY, DO NOT CLAIM THAT AN OBJECT IS A COMET.

    We will be operating a "reputation based" system for judging whether claims are valid. If you report cometary activity for an object later shown to be asteroidal, you may find that future reports of cometary activity by your observing station will be ignored by the MPC.

    Page last updated on July 15.579 UTC.
    Problems? Comments?

    The following objects either display comet-like orbits but have not had their cometary nature confirmed, or are suspected of displaying cometary activity. To get ephemerides of these objects, refer to the MPC ephemeris service. Please submit reports of cometary activity here.
      Desig.       R.A.       Decl.       Magn.       Elong.    
    A/2010 LN13510 48.8-17 4929.061
    A/2018 V310 41.1+16 0827.844
    A/2018 W315 54.5+32 2621.0104
    A/2019 G307 13.4+03 2428.719
    A/2019 N207 10.9+75 3924.554
    A/2019 O411 27.7+04 0626.758
    A/2019 Q214 04.1-25 3730.0105
    A/2019 T111 25.8-07 2623.463
    A/2020 A101 33.8+42 4129.676
    A/2020 B115 46.1-37 5532.5128
    A/2020 H910 12.1+53 2129.743
    A/2020 M410 33.6+06 2925.345
    A/2021 E205 29.3+34 1326.031
    A/2021 E400 26.3+54 2722.982
    A/2022 B304 16.2-20 0126.264
    A/2023 H403 14.5+40 2425.258
    A/2023 R310 36.7+08 0126.145
    A/2024 D110 05.4+47 3721.639
    2007 SA2405 54.8+15 5622.825
    2008 BJ2210 28.5+11 4521.142
    2009 KF3710 02.0+18 5223.834
    2010 KG4302 25.4+26 2321.170
    2010 LH1503 51.5+17 0921.853
    2011 UG10418 11.3+03 2123.8147
    2012 KA5110 44.6-36 0926.273
    2014 XK608 06.4+30 3225.511
    2017 FL3622 29.8-05 3021.4136
    2018 BJ1101 40.9+11 0921.685
    2019 AV409 29.3+16 0223.627
    2021 TR8117 26.9+08 2225.2136
    2022 AB818 35.3+06 1925.7148
    2022 DQ1703 27.0-08 5325.269
    2022 OF6008 52.9+04 4627.825
    2023 BN1314 06.1-19 1224.3103
    2023 JN1622 18.3-15 4519.5142
    2023 RS6102 09.8+28 3021.973
    (7341)07 34.9+21 4918.31
    (523676)13 15.2-17 0924.091

    Notes on how to begin your own astrometric program are available. Please ensure that you have read the additional notes on the NEOCP (which are relevant to the PCCP). Please do not report observations of non-NEOCP objects in the same message as observations of objects on this page! Please report unsuccessful attempts to detect objects listed here that are NOT listed as `updated' or that have not been updated in the past 24 hours using the NEOCP Blog. Please note that observations and orbits of objects accessible via this service are made available only for your personal use. They are not to be promulgated via any medium. The data are preliminary until they appear on an MPEC or MPS.

    You can now access ephemerides for the variant orbits used in the uncertainty plots from the pages listing the offsets from the nominal solutions. Please read (or here) about the coloration used in the uncertainty plots.

    You are reminded that a cross-reference of designations that have appeared here previously is available elsewhere.