MPEC 2021-M83 : COMET C/2014 UN271 (Bernardinelli-Bernstein)
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M.P.E.C. 2021-M83 Issued 2021 June 24, 06:14 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2014 UN271 (Bernardinelli-Bernstein)
This object, which was assigned a minor planet designation based upon
its initial report, has been found to display cometary features as follows:
OC Date Reporter Coma Tail PA Exposures
L81 2021-06-22 L. Buzzi 15" 0-90 45x90s
K93 2021-06-22 T. Lister 7".8
Observations:
CK14UR1N KC2014 08 14.59978001 42 23.996-35 36 37.60 22.58GVEM083F51
CK14UR1N OC2014 08 28.60113601 41 25.15 -36 02 11.8 22.1 rVEM083568
CK14UR1N OC2014 08 28.60381801 41 25.15 -36 02 12.2 23.6 uVEM083568
CK14UR1N OC2014 08 28.60641901 41 25.11 -36 02 12.4 23.0 gVEM083568
CK14UR1N OC2014 08 28.60906401 41 25.10 -36 02 12.6 21.7 iVEM083568
CK14UR1N OC2014 08 28.61174301 41 25.09 -36 02 13.0 22.2 rVEM083568
CK14UR1N*-C2014 10 20.29435 01 34 35.019-37 14 46.14 22.49rVEM083W84
CK14UR1N -C2014 11 04.12204 01 32 21.029-37 23 21.14 21.97zVEM083W84
CK14UR1N -C2014 11 15.25191 01 30 47.039-37 25 39.20 22.43zVEM083W84
CK14UR1N -C2014 11 18.23559 01 30 23.425-37 25 40.01 22.12rVEM083W84
CK14UR1N -C2014 11 18.23835 01 30 23.407-37 25 39.98 22.15iVEM083W84
CK14UR1N -C2014 11 27.22148 01 29 17.583-37 24 12.51 22.71gVEM083W84
CK14UR1N -C2014 12 11.11568 01 27 54.830-37 17 49.64 21.94iVEM083W84
CK14UR1N -C2015 01 09.10701 01 26 35.324-36 51 38.75 22.80zVEM083W84
CK14UR1N KC2015 08 11.61298001 47 05.427-37 26 12.91 21.87GVEM083F51
CK14UR1N -C2015 08 17.35747 01 46 47.505-37 37 39.81 22.23rVEM083W84
CK14UR1N -C2015 08 17.35883 01 46 47.517-37 37 39.89 22.55gVEM083W84
CK14UR1N -C2015 08 24.34452 01 46 18.605-37 51 28.61 22.62gVEM083W84
CK14UR1N -C2015 09 02.37787 01 45 30.196-38 08 52.30 22.21YVEM083W84
CK14UR1N -C2015 09 13.39051 01 44 15.863-38 28 51.62 21.95iVEM083W84
CK14UR1N -C2015 10 06.27435 01 40 59.774-39 03 19.84 22.01zVEM083W84
CK14UR1N -C2015 11 20.22851 01 33 55.078-39 29 32.57 22.33zVEM083W84
CK14UR1N -C2015 11 20.23556 01 33 55.010-39 29 32.48 22.13iVEM083W84
CK14UR1N -C2016 01 11.09386 01 29 57.738-38 50 26.06 22.13rVEM083W84
CK14UR1N -C2016 01 11.09524 01 29 57.729-38 50 25.96 22.89gVEM083W84
CK14UR1N C2016 08 09.58536001 52 24.356-39 29 37.72 22.16GVEM083F51
CK14UR1N C2016 08 09.59528201 52 24.325-39 29 39.11 22.13GVEM083F51
CK14UR1N -C2016 10 01.29899 01 46 40.180-41 11 31.78 21.65rVEM083W84
CK14UR1N -C2016 10 01.30036 01 46 40.173-41 11 32.00 21.96gVEM083W84
CK14UR1N -C2016 10 03.31546 01 46 20.177-41 14 24.53 21.91rVEM083W84
CK14UR1N -C2016 10 03.31682 01 46 20.167-41 14 24.59 22.56gVEM083W84
CK14UR1N KC2017 08 13.57144901 58 27.697-41 56 20.77 21.81GVEM083F51
CK14UR1N KC2017 08 14.58512301 58 24.711-41 58 44.07 21.49GVEM083F51
CK14UR1N KC2017 09 08.55424701 56 09.883-42 55 16.28 21.76GVEM083F51
CK14UR1N KC2017 09 30.42187801 52 49.635-43 36 32.72 22.02GVEM083F51
CK14UR1N -C2017 10 15.27208 01 50 05.746-43 57 07.30 21.97gVEM083W84
CK14UR1N -C2017 10 15.33777 01 50 04.988-43 57 11.80 21.23zVEM083W84
CK14UR1N -C2017 10 15.33915 01 50 04.970-43 57 11.89 21.63rVEM083W84
CK14UR1N KC2017 10 29.35825001 47 22.733-44 09 45.25 21.54GVEM083F51
CK14UR1N KC2017 11 06.33049701 45 51.862-44 13 42.34 22.08GVEM083F51
CK14UR1N KC2017 12 11.25003001 40 25.195-44 04 24.94 21.53GVEM083F51
CK14UR1N -C2017 12 15.18042 01 39 59.837-44 00 56.40 22.04rVEM083W84
CK14UR1N -C2017 12 15.18181 01 39 59.824-44 00 56.38 22.44gVEM083W84
CK14UR1N -C2018 10 21.24337 01 55 54.039-46 47 14.94 21.60YVEM083W84
CK14UR1N -C2018 10 27.17859 01 54 38.204-46 52 42.84 21.43zVEM083W84
CK14UR1N -C2018 11 08.23513 01 52 05.914-46 59 29.07 21.63rVEM083W84
CK14UR1N -C2018 11 08.23651 01 52 05.899-46 59 29.10 21.57iVEM083W84
CK14UR1N -C2018 11 08.23789 01 52 05.884-46 59 29.05 22.22gVEM083W84
CK14UR1N KC2019 08 19.59829602 14 55.242-47 31 52.43 20.30GVEM083F51
CK14UR1N C2019 08 29.56986902 14 08.352-47 59 21.63 20.58GVEM083F51
CK14UR1N C2019 08 29.58523402 14 08.234-47 59 24.18 20.66GVEM083F51
CK14UR1N C2019 08 29.59292102 14 08.226-47 59 25.21 20.52GVEM083F51
CK14UR1N KC2021 06 22.13538 02 35 28.86 -51 07 43.1 VEM083L81
CK14UR1N KC2021 06 22.16834 02 35 29.32 -51 07 47.8 19.6 GVEM083L81
CK14UR1N C2021 06 22.16880502 35 29.32 -51 07 47.7 19.8 GVEM083K93
CK14UR1N C2021 06 22.17258202 35 29.36 -51 07 48.5 19.9 GVEM083K93
CK14UR1N C2021 06 22.17636102 35 29.38 -51 07 48.9 19.9 GVEM083K93
CK14UR1N C2021 06 22.18014202 35 29.47 -51 07 49.2 19.6 GVEM083K93
Observer details:
568 Mauna Kea. Observer . Measurer S. Deen.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
K93 Sutherland-LCO C. Observers T. Lister, R. Kokotanekova, M. Schwamb, M. T.
Bannister, C. Holt, J. Chatelain, E. Gomez, S. Greenstreet. Measurer T.
Lister. 1.0-m f/8.0 Ritchey-Chretien + CCD.
L81 Skygems Namibia Remote Observatory. Observers L. Buzzi, L. Demetz.
Measurers A. Aletti, L. Buzzi. 0.51-m f/6.7 astrograph + CCD.
W84 Cerro Tololo-DECam. Observer D. E. Survey. Measurers P. Bernardinelli,
G. Bernstein. 4.0-m CTIO reflector + CCD.
Orbital elements:
C/2014 UN271 (Bernardinelli-Bernstein)
Epoch 2031 Jan. 14.0 TT = JDT 2462880.5
T 2031 Jan. 22.92336 TT Rudenko
q 10.9501320 (2000.0) P Q
z -0.0000652 Peri. 326.32129 -0.81028361 -0.55983890
+/-0.0000031 Node 190.02358 +0.03906991 -0.34660264
e 1.0007145 Incl. 95.45457 -0.58473414 +0.75262674
From 58 observations 2014 Aug. 14-2021 June 22, mean residual 0".1.
C/2014 UN271 (Bernardinelli-Bernstein)
Epoch 2021 July 5.0 TT = JDT 2459400.5
T 2031 Jan. 27.21566 TT Rudenko
q 10.9336415 (2000.0) P Q
z +0.0001389 Peri. 326.38106 -0.81120466 -0.55900137
+/-0.0000031 Node 189.92916 +0.04001314 -0.34591617
e 0.9984814 Incl. 95.44590 -0.58339176 +0.75356451
From 58 observations 2014 Aug. 14-2021 June 22, mean residual 0".1.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2021 05 25 02 27 57.2 -50 17 36 20.5282 20.2806 74.5 2.8 20.2
...
2021 06 09 02 32 11.4 -50 40 30 20.3555 20.2256 81.2 2.8 20.2
...
2021 06 17 02 34 15.0 -50 56 20 20.2603 20.1963 85.0 2.9 20.2
...
2021 06 23 02 35 40.8 -51 09 44 20.1885 20.1743 87.8 2.9 20.2
2021 06 24 02 35 54.4 -51 12 05 20.1765 20.1707 88.2 2.9 20.2
2021 06 25 02 36 07.9 -51 14 28 20.1646 20.1670 88.7 2.9 20.2
...
2021 07 01 02 37 24.5 -51 29 29 20.0932 20.1451 91.5 2.9 20.1
...
2021 07 09 02 38 54.6 -51 51 15 19.9993 20.1158 95.1 2.9 20.1
...
2021 07 24 02 41 00.8 -52 36 29 19.8317 20.0609 101.6 2.8 20.1
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-M83
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