MPEC 2023-C66 : COMET P/2021 PE20 (ATLAS)
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M.P.E.C. 2023-C66 Issued 2023 February 10, 07:03 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets, routine data on comets and natural satellites,
and occasional editorial announcements. 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 P/2021 PE20 (ATLAS)
H. Sato reports cometary activity of 2021 PE20 (discovered by ATLAS HKO
(T05) on 2021 Aug. 12 UT) in 10 stacked 60-second exposures taken at
iTelescope Observatory (Q62) on 2021 Aug. 13, noting a very condensed 10"
coma. Additional reports of cometary features are as follows:
OC Date Reporter Coma Tail PA Exposures
Q64 2021-08-13 M. Micheli 7" 10" 245
L81 2021-08-16 A. Aletti 6" 6" 250
T08 2021-08-18 N. Erasmus 9".6 10" 320 4x30s
F51 2021-08-25 R. Weryk 1".1 6" 215-289 4x45s
T08 2021-08-26 A. Fitzsimmons 8" 4x30s
I41 2021-08-30 G. Blasco 5" 6" 240 1x30s
J04 2021-09-07 R. Kresken 8" 15" 250
G96 2021-09-13 M. Micheli 10" 30" 260
W84 2021-09-20 K. Ly 4" 30" 250-290
W84 2021-09-23 G. Blasco 5" 25" 255-265
F52 2021-09-28 R. Weryk 1".4 4x45s
F51 2021-10-31 R. Weryk 1".4 4x45s
Observations:
PK21P20E ZC2021 08 09.46636403 36 22.76 -08 27 10.7 20.1 rVEC066I41
PK21P20E ZC2021 08 12.45584703 41 26.30 -08 34 39.4 19.1 gVEC066I41
PK21P20E* C2021 08 12.58905803 41 39.29 -08 34 59.0 19.07oVEC066T05
PK21P20E C2021 08 12.59226603 41 39.55 -08 35 00.1 18.38oVEC066T05
PK21P20E C2021 08 12.59998403 41 40.32 -08 35 00.9 18.91oVEC066T05
PK21P20E C2021 08 12.61789903 41 41.97 -08 35 04.3 18.61oVEC066T05
PK21P20E 1C2021 08 13.79705 03 43 35.07 -08 38 15.8 VEC066Q62
PK21P20E 1C2021 08 13.80152 03 43 35.47 -08 38 16.3 18.2 GVEC066Q62
PK21P20E KC2021 08 13.80799503 43 36.070-08 38 16.95 19.4 GVEC066Q64
PK21P20E KC2021 08 13.81201603 43 36.438-08 38 17.67 19.3 GVEC066Q64
PK21P20E KC2021 08 13.81603903 43 36.812-08 38 18.38 19.9 GVEC066Q64
PK21P20E C2021 08 14.08320803 44 02.09 -08 39 14.0 18.5 GVEC066L01
PK21P20E C2021 08 14.08399803 44 02.17 -08 39 14.6 18.5 GVEC066L01
PK21P20E C2021 08 14.08479603 44 02.25 -08 39 14.3 18.7 GVEC066L01
PK21P20E KC2021 08 14.08638103 44 02.38 -08 39 14.6 18.5 GVEC066L01
PK21P20E KC2021 08 14.10674403 44 04.34 -08 39 18.5 VEC066204
PK21P20E KC2021 08 14.11829803 44 05.37 -08 39 20.5 19.3 GVEC066204
PK21P20E ZC2021 08 14.44454703 44 35.95 -08 40 16.9 19.3 gVEC066I41
PK21P20E KC2021 08 15.24781803 45 49.73 -08 42 32.6 18.4 GXEC066Y00
PK21P20E KC2021 08 15.24983803 45 49.94 -08 42 33.3 19.0 GXEC066Y00
PK21P20E KC2021 08 15.25186303 45 50.13 -08 42 32.5 19.1 GXEC066Y00
PK21P20E KC2021 08 15.69772 03 46 30.11 -08 43 55.5 18.6 RqEC066E94
PK21P20E KC2021 08 15.70959 03 46 31.22 -08 43 57.7 18.5 RqEC066E94
PK21P20E 1C2021 08 15.71446 03 46 31.80 -08 43 59.2 VEC066Q62
PK21P20E 1C2021 08 15.71786 03 46 32.11 -08 43 59.9 18.4 GVEC066Q62
PK21P20E KC2021 08 15.72342 03 46 32.36 -08 44 00.0 18.5 RqEC066E94
PK21P20E 1C2021 08 16.15129 03 47 10.57 -08 45 23.2 VEC066L81
PK21P20E 1C2021 08 16.16448 03 47 11.71 -08 45 25.8 19.0 GVEC066L81
PK21P20E 1C2021 08 16.17694 03 47 12.79 -08 45 28.0 VEC066L81
PK21P20E ZC2021 08 17.44236003 49 03.06 -08 49 42.1 19.4 gVEC066I41
PK21P20E C2021 08 18.55783503 50 36.64 -08 53 27.9 18.99cVEC066T08
PK21P20E C2021 08 18.56152503 50 36.32 -08 53 31.9 17.70cVEC066T08
PK21P20E C2021 08 18.56706703 50 37.38 -08 53 29.5 18.80cVEC066T08
PK21P20E C2021 08 18.57720503 50 38.15 -08 53 31.3 19.19cVEC066T08
PK21P20E C2021 08 21.55783203 54 32.80 -09 04 21.0 18.64oVEC066T08
PK21P20E C2021 08 21.56105803 54 32.99 -09 04 21.9 18.80oVEC066T08
PK21P20E C2021 08 21.56152003 54 33.00 -09 04 23.1 18.64oVEC066T08
PK21P20E C2021 08 21.57764203 54 34.22 -09 04 26.3 18.90oVEC066T08
PK21P20E C2021 08 22.59777003 55 49.28 -09 08 22.8 18.20oVEC066T08
PK21P20E C2021 08 22.60099803 55 49.43 -09 08 23.0 18.41oVEC066T08
PK21P20E C2021 08 22.61439703 55 50.45 -09 08 27.6 18.43oVEC066T08
PK21P20E C2021 08 22.62592003 55 51.22 -09 08 28.2 18.45oVEC066T08
PK21P20E C2021 08 22.62730303 55 51.26 -09 08 29.7 18.43oVEC066T08
PK21P20E C2021 08 25.55105703 59 11.615-09 20 24.66 19.10iUEC066F51
PK21P20E C2021 08 25.56272903 59 12.344-09 20 27.65 19.13iUEC066F51
PK21P20E C2021 08 25.57438903 59 13.071-09 20 30.70 19.12iUEC066F51
PK21P20E C2021 08 25.58603403 59 13.786-09 20 33.68 19.18iUEC066F51
PK21P20E C2021 08 26.53130704 00 13.74 -09 24 36.2 16.70oVEC066T08
PK21P20E C2021 08 26.53500004 00 13.86 -09 24 37.3 17.59oVEC066T08
PK21P20E C2021 08 26.54146404 00 14.45 -09 24 38.2 18.43oVEC066T08
PK21P20E C2021 08 26.55700804 00 15.27 -09 24 43.8 18.60oVEC066T08
PK21P20E ZC2021 08 27.45386904 01 09.87 -09 28 39.9 18.5 gVEC066I41
PK21P20E ZC2021 08 27.48249504 01 11.51 -09 28 47.4 17.9 gVEC066I41
PK21P20E C2021 08 28.55077404 02 13.73 -09 33 32.5 17.92oVEC066T05
PK21P20E C2021 08 28.55399504 02 13.97 -09 33 33.2 18.27oVEC066T05
PK21P20E C2021 08 28.56086804 02 14.28 -09 33 34.7 18.51oVEC066T05
PK21P20E C2021 08 28.57284504 02 14.98 -09 33 38.2 18.05oVEC066T05
PK21P20E |C2021 08 29.30681 04 02 55.96 -09 36 52.6 18.6 VuEC066807
PK21P20E |C2021 08 29.30960 04 02 56.11 -09 36 53.0 18.3 VuEC066807
PK21P20E |C2021 08 29.31240 04 02 56.26 -09 36 53.7 18.7 VuEC066807
PK21P20E ZC2021 08 30.44505804 03 56.62 -09 42 16.7 18.0 rVEC066I41
PK21P20E ZC2021 08 30.48527104 03 58.58 -09 42 28.8 18.5 gVEC066I41
PK21P20E KC2021 09 03.08020 04 06 46.88 -09 59 52.2 17.7 GVEC066A17
PK21P20E KC2021 09 03.08807 04 06 47.22 -09 59 54.6 18.1 GVEC066A17
PK21P20E KC2021 09 03.09593 04 06 47.61 -09 59 57.5 18.4 GVEC066A17
PK21P20E C2021 09 03.58552504 07 07.63 -10 02 20.6 17.50oVEC066T08
PK21P20E C2021 09 03.58874504 07 07.73 -10 02 21.7 18.15oVEC066T08
PK21P20E C2021 09 03.59565504 07 07.97 -10 02 23.6 17.90oVEC066T08
PK21P20E C2021 09 03.61006004 07 08.59 -10 02 27.9 17.37oVEC066T08
PK21P20E !C2021 09 07.20239504 09 16.492-10 20 49.76 18.9 GVEC066J04
PK21P20E !C2021 09 07.20349904 09 16.534-10 20 50.16 19.3 GVEC066J04
PK21P20E !C2021 09 07.20459704 09 16.575-10 20 50.46 19.4 GVEC066J04
PK21P20E ZC2021 09 13.45071804 11 33.244-10 53 57.22 19.3 GVEC066G96
PK21P20E ZC2021 09 13.45545804 11 33.292-10 53 58.84 19.7 GVEC066G96
PK21P20E ZC2021 09 13.46017404 11 33.347-10 54 00.39 19.1 GVEC066G96
PK21P20E ZC2021 09 13.46489804 11 33.401-10 54 01.84 19.5 GVEC066G96
PK21P20E /C2021 09 20.30179404 11 57.96 -11 30 08.5 18.9 iXEC066W84
PK21P20E /C2021 09 20.30270604 11 57.94 -11 30 08.8 18.7 zXEC066W84
PK21P20E /C2021 09 21.31895704 11 50.40 -11 35 24.2 18.9 iXEC066W84
PK21P20E /C2021 09 21.31986204 11 50.41 -11 35 24.6 18.8 zXEC066W84
PK21P20E /C2021 09 23.28950904 11 27.86 -11 45 25.1 18.9 iXEC066W84
PK21P20E /C2021 09 23.29042804 11 27.83 -11 45 25.3 18.8 zXEC066W84
PK21P20E /C2021 09 26.36019904 10 31.08 -12 00 27.0 18.9 iXEC066W84
PK21P20E /C2021 09 26.36111804 10 31.06 -12 00 26.9 18.9 zXEC066W84
PK21P20E C2021 09 28.52211504 09 36.139-12 10 35.56 20.16wUEC066F52
PK21P20E C2021 09 28.53296104 09 35.800-12 10 38.57 20.64wUEC066F52
PK21P20E C2021 09 28.54374104 09 35.457-12 10 41.61 20.17wUEC066F52
PK21P20E C2021 09 28.55452204 09 35.122-12 10 44.90 20.95wUEC066F52
PK21P20E C2021 10 14.46274803 56 50.58 -13 00 48.8 20.25GVEC066G96
PK21P20E C2021 10 14.46797403 56 50.23 -13 00 49.6 20.25GVEC066G96
PK21P20E C2021 10 14.47454903 56 49.71 -13 00 51.0 19.67GVEC066G96
PK21P20E C2021 10 14.47976103 56 49.44 -13 00 52.1 20.75GVEC066G96
PK21P20E C2021 10 14.56961103 56 43.692-13 00 57.00 21.59wUEC066F51
PK21P20E C2021 10 14.58063003 56 42.926-13 00 57.56 21.68wUEC066F51
PK21P20E C2021 10 14.59167003 56 42.151-13 00 58.68 21.95wUEC066F51
PK21P20E C2021 10 31.46337403 35 18.055-12 40 18.07 20.92wUEC066F51
PK21P20E C2021 10 31.47538503 35 17.000-12 40 15.16 20.94wUEC066F51
PK21P20E C2021 10 31.48741103 35 15.976-12 40 12.07 20.57wUEC066F51
PK21P20E C2021 10 31.49947803 35 14.982-12 40 09.52 21.09wUEC066F51
PK21P20E C2021 11 11.40695 03 20 32.472-11 37 51.69 22.3 wUEC066F51
PK21P20E C2021 11 11.41983 03 20 31.419-11 37 46.03 22.3 wUEC066F51
PK21P20E C2021 11 11.43271 03 20 30.391-11 37 40.09 22.5 wUEC066F51
PK21P20E C2021 11 12.23740103 19 28.39 -11 31 38.1 21.35GVEC066G96
PK21P20E C2021 11 12.24351203 19 27.92 -11 31 35.7 20.98GVEC066G96
PK21P20E C2021 11 12.24962203 19 27.44 -11 31 31.1 20.99GVEC066G96
PK21P20E C2021 11 12.25573203 19 26.97 -11 31 28.1 21.21GVEC066G96
Observer details:
204 Schiaparelli Observatory. Observer L. Buzzi. Measurers L. Buzzi, A.
Aletti. 0.84-m f/3.5 reflector + CCD.
807 Cerro Tololo Observatory, La Serena. Observers T. Linder, R. Holmes, L.
Horn. 0.61-m f/6.5 astrograph + CCD.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6.0 Schmidt-Cassegrain + CCD.
E94 Possum Observatory, Gisborne. Observer J. Drummond. 0.35-m f/10 Schmidt-
Cassegrain + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, M.
Willman, I. Smith. Measurers K. Chambers, S. Chastel, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
Ramanjooloo, R. Wainscoat, R. Weryk, H. Gao. 1.8-m Ritchey-Chretien +
CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, I.
Smith. Measurers K. Chambers, S. Chastel, T. de Boer, J. Fairlamb, H.
Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers H. Groeller, G. J. Leonard, D. Rankin.
Measurers M. Micheli, B. Gray, E. J. Christensen, G. A. Farneth, D. C.
Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A. Kowalski, S. M.
Larson, G. J. Leonard, D. Rankin, R. L. Seaman, F. C. Shelly, K. W.
Wierzchos. 1.5-m reflector + CCD, 1.5-m reflector + 10K CCD.
I41 Palomar Mountain--ZTF. Observer . Measurer S. Deen. 1.2-m Oschin
Schmidt + CCD.
J04 ESA Optical Ground Station, Tenerife. Observer P. Ruiz. Measurers M.
Micheli, R. Kresken, D. Fohring, D. Koschny, L. Conversi. 1.0-m f/4.4
reflector + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, J. Dragic, P. Dusevic,
K. Floricic, L. Gelo, D. Grzinic, F. Hrzenjak, P. Jukic, S. Miljkovic, I.
Paleka, V. K. Pavcnik, I. Perovic, E. Pettarin, D. Pujagic. Measurers I.
Paleka, V. K. Pavcnik. 1.0-m f/2.9 reflector + CCD.
L81 Skygems Namibia Remote Observatory. Observers L. Buzzi, L. Demetz.
Measurers A. Aletti, L. Buzzi, G. Galli. 0.51-m f/6.7 astrograph + CCD.
Q62 iTelescope Observatory, Siding Spring. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
Q64 Siding Spring-LCO B. Observers T. Santana-Ros, L. Conversi, M. Micheli.
Measurers M. Micheli, R. Reszelewski. 1.0-m f/8 Ritchey-Chretien + CCD.
T05 ATLAS-HKO, Haleakala. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, A.
Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector + CCD.
T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, A.
Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector + CCD.
W84 Cerro Tololo-DECam. Observers Y. Shen, J. Pierel, A. Zenteno, D. Brout.
Measurer K. Ly. 4.0-m CTIO reflector + CCD.
Y00 SONEAR Observatory, Oliveira. Observers C. Jacques, E. Pimentel, J.
Barros. Measurer C. Jacques. 0.45-m f/2.9 reflector + CCD.
Orbital elements:
P/2021 PE20 (ATLAS)
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5
T 2021 June 7.02637 TT Rudenko
q 1.2345703 (2000.0) P Q
n 0.13597469 Peri. 210.46428 +0.61388134 +0.71366803
a 3.7453924 Node 99.63097 -0.63753520 +0.70025547
e 0.6703762 Incl. 20.01137 -0.46550893 -0.01789444
P 7.25
From 102 observations 2021 Aug. 9-Nov. 11, mean residual 0".6.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2023 01 11 06 22 07.6 +22 40 34 3.8213 4.7778 164.9 3.1 26.7
...
2023 01 26 06 11 50.1 +23 08 46 3.9831 4.8408 147.3 6.3 26.9
...
2023 02 03 06 07 32.8 +23 21 49 4.0949 4.8738 138.2 7.7 26.9
...
2023 02 09 06 04 58.6 +23 30 48 4.1885 4.8982 131.5 8.7 27.0
2023 02 10 06 04 36.3 +23 32 14 4.2048 4.9022 130.4 8.8 27.0
2023 02 11 06 04 14.9 +23 33 40 4.2213 4.9063 129.3 9.0 27.0
...
2023 02 17 06 02 27.5 +23 41 52 4.3242 4.9304 122.8 9.7 27.1
...
2023 02 25 06 00 59.9 +23 52 04 4.4701 4.9621 114.4 10.5 27.2
...
2023 03 12 06 01 01.4 +24 09 12 4.7613 5.0203 99.4 11.3 27.4
M. P. C. Staff (C) Copyright 2023 MPC M.P.E.C. 2023-C66
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