[Iaude] MPEC E08: COMET C/2021 X2 (Bok)
mpec at cfa.harvard.edu
mpec at cfa.harvard.edu
Fri Mar 1 23:41:50 EST 2024
M.P.E.C. 2024-E08 Issued 2024 March 2, 04:39 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2021 X2 (Bok)
R. A. Mastaler reports cometary activity of a near-parabolic minor planet
A/2021 X2 (discovered by Kitt Peak-Bok on Dec. 1, 2021 UT) in images taken
on Dec. 20, 2021 UT at Kitt Peak (695), noting a diffuse 1" coma. Additional
reports of cometary features are as follows:
OC Date Reporter Coma Tail PA Exposures
568 2022-02-05 K. J. Meech 2" 5" 50
D35 2022-08-08 Y.-C. Cheng 2".1 5" 30-330 3x420s
D35 2022-08-20 Y.-C. Cheng 2".5 7".5 0-60 5x600s
T14 2022-11-23 K. J. Meech 4" 25" 40
T14 2022-12-15 K. J. Meech 3" 15" 55
Observations:
CK21X020 C2021 10 30.61020506 48 09.293+55 34 51.66 22.41GVEE008F51
CK21X020 C2021 10 30.61810006 48 08.330+55 34 54.33 22.86GVEE008F51
CK21X020 C2021 10 30.62597506 48 07.413+55 34 56.97 23.17GVEE008F51
CK21X020 C2021 10 30.63393806 48 06.427+55 34 59.64 23.34GVEE008F51
CK21X020 C2021 11 08.57878906 27 38.247+56 17 24.47 22.52GVEE008F52
CK21X020 C2021 11 08.59085206 27 36.343+56 17 26.78 23.10GVEE008F52
CK21X020* C2021 12 01.37798105 13 10.91 +55 56 12.7 21.60GVEE008V00
CK21X020 C2021 12 01.38287105 13 09.79 +55 56 10.6 21.82GVEE008V00
CK21X020 C2021 12 01.38773505 13 08.73 +55 56 08.8 VEE008V00
CK21X020 C2021 12 01.39260505 13 07.60 +55 56 06.2 21.98GVEE008V00
CK21X020 KC2021 12 01.47688205 12 48.67 +55 55 28.3 22.33GVEE008V06
CK21X020 KC2021 12 01.47867505 12 48.28 +55 55 27.3 21.81GVEE008V06
CK21X020 KC2021 12 01.49170405 12 45.356+55 55 22.20 22.4 GVEE008679
CK21X020 KC2021 12 02.18184705 10 12.01 +55 50 05.9 22.75GVEE008V06
CK21X020 KC2021 12 02.18367605 10 11.61 +55 50 05.2 21.71GVEE008V06
CK21X020 KC2021 12 07.42872104 50 41.72 +54 59 31.6 21.21GVEE008V06
CK21X020 KC2021 12 07.43428404 50 40.45 +54 59 28.5 VEE008V06
CK21X020 KC2021 12 07.43984404 50 39.24 +54 59 23.9 21.71GVEE008V06
CK21X020 |C2021 12 12.34496 04 32 50.22 +53 55 20.8 VEE008H06
CK21X020 |C2021 12 12.35343 04 32 48.34 +53 55 13.3 21.1 GVEE008H06
CK21X020 2C2021 12 12.86029404 31 00.88 +53 47 41.3 21.1 GVEE008Z84
CK21X020 2C2021 12 12.87256604 30 58.26 +53 47 30.6 20.4 GVEE008Z84
CK21X020 2C2021 12 12.88483704 30 55.63 +53 47 19.6 21.2 GVEE008Z84
CK21X020 DC2021 12 18.13881 04 12 58.34 +52 20 23.6 22.9 GVEE008695
CK21X020 DC2021 12 18.15631 04 12 54.86 +52 20 04.6 21.9 GVEE008695
CK21X020 DC2021 12 18.17380 04 12 51.38 +52 19 45.4 21.8 GVEE008695
CK21X020 DC2021 12 20.13371 04 06 31.87 +51 43 25.9 21.7 GVEE008695
CK21X020 DC2021 12 20.14332 04 06 30.03 +51 43 15.0 21.7 GVEE008695
CK21X020 DC2021 12 20.15293 04 06 28.18 +51 43 04.0 21.6 GVEE008695
CK21X020 KC2022 01 01.86220 03 31 25.95 +47 11 15.9 20.5 RqEE008215
CK21X020 KC2022 01 01.86478 03 31 25.65 +47 11 11.7 20.6 RqEE008215
CK21X020 KC2022 01 01.86736 03 31 25.31 +47 11 07.8 20.4 RqEE008215
CK21X020 DC2022 01 13.20949 03 09 19.26 +42 45 53.4 21.8 GVEE008695
CK21X020 DC2022 01 13.22377 03 09 17.87 +42 45 33.0 VEE008695
CK21X020 DC2022 01 13.23805 03 09 16.46 +42 45 12.9 21.4 GVEE008695
CK21X020 DC2022 01 15.22471 03 06 14.04 +41 59 11.2 21.5 GVEE008695
CK21X020 DC2022 01 15.23726 03 06 12.90 +41 58 53.7 21.3 GVEE008695
CK21X020 DC2022 01 15.24981 03 06 11.77 +41 58 36.3 22.0 GVEE008695
CK21X020 DC2022 01 18.17468 03 02 07.75 +40 51 44.7 21.7 GVEE008695
CK21X020 DC2022 01 18.18907 03 02 06.60 +40 51 25.0 VEE008695
CK21X020 _C2022 02 05.22246902 46 02.975+34 37 31.08 21.7 GVEE008568
CK21X020 _C2022 02 05.22437302 46 02.918+34 37 29.10 21.4 GVEE008568
CK21X020 _C2022 02 05.22628102 46 02.853+34 37 26.97 21.7 GVEE008568
CK21X020 _C2022 07 25.57217003 38 21.936+07 52 12.10 21.2 GVEE008568
CK21X020 _C2022 07 25.57407603 38 21.935+07 52 10.49 21.3 GVEE008568
CK21X020 _C2022 07 25.57598003 38 21.935+07 52 08.84 21.2 GVEE008568
CK21X020 1C2022 08 09.80680 03 35 53.49 +03 41 46.8 VEE008Q62
CK21X020 1C2022 08 09.81517 03 35 53.30 +03 41 37.0 20.8 GVEE008Q62
CK21X020 C2022 08 09.84418 03 35 52.86 +03 41 02.3 20.2 RoEE008D35
CK21X020 C2022 08 09.85079 03 35 52.74 +03 40 55.7 20.2 RoEE008D35
CK21X020 C2022 08 09.85568 03 35 52.59 +03 40 50.2 20.0 RoEE008D35
CK21X020 C2022 08 20.78289 03 30 38.77 -00 04 12.7 20.7 RoEE008D35
CK21X020 C2022 08 20.79009 03 30 38.48 -00 04 22.1 20.1 RoEE008D35
CK21X020 C2022 08 20.79706 03 30 38.16 -00 04 31.5 20.2 RoEE008D35
CK21X020 C2022 08 20.80735 03 30 37.78 -00 04 44.6 20.0 RoEE008D35
CK21X020 C2022 08 20.81432 03 30 37.53 -00 04 54.6 20.0 RoEE008D35
CK21X020 C2022 08 21.81861 03 29 58.16 -00 27 44.9 20.1 RoEE008D35
CK21X020 C2022 08 21.82559 03 29 57.89 -00 27 54.2 20.7 RoEE008D35
CK21X020 C2022 08 21.83256 03 29 57.62 -00 28 03.7 20.2 RoEE008D35
CK21X020 _C2022 08 23.53816603 28 46.424-01 07 43.49 21.0 GVEE008568
CK21X020 _C2022 08 23.54006903 28 46.354-01 07 45.70 21.0 GVEE008568
CK21X020 _C2022 08 23.54197003 28 46.256-01 07 48.70 21.2 GVEE008568
CK21X020 C2022 08 24.82972 03 27 48.73 -01 38 25.4 20.0 RoEE008D35
CK21X020 C2022 08 24.83670 03 27 48.39 -01 38 35.5 20.5 RoEE008D35
CK21X020 C2022 08 24.84367 03 27 48.07 -01 38 46.0 20.8 RoEE008D35
CK21X020 C2022 09 08.60006903 12 34.657-08 13 15.52 20.71wUEE008F52
CK21X020 C2022 09 08.60779703 12 34.050-08 13 29.08 20.71wUEE008F52
CK21X020 C2022 09 08.62333403 12 32.813-08 13 56.22 20.89wUEE008F52
CK21X020 KC2022 09 21.10121 02 52 54.94 -14 38 18.8 19.6 RqEE008215
CK21X020 KC2022 09 21.10379 02 52 54.68 -14 38 23.1 20.1 RqEE008215
CK21X020 KC2022 09 21.10637 02 52 54.44 -14 38 27.8 19.6 RqEE008215
CK21X020 C2022 09 23.51744402 48 21.959-15 55 30.95 20.69wUEE008F52
CK21X020 C2022 09 23.52977502 48 20.536-15 55 53.91 20.59wUEE008F52
CK21X020 C2022 09 23.54209502 48 19.071-15 56 18.04 20.85wUEE008F52
CK21X020 C2022 09 23.55430402 48 17.648-15 56 41.14 20.59wUEE008F52
CK21X020 C2022 10 02.39657702 29 40.776-20 37 15.60 19.85GVEE008G96
CK21X020 C2022 10 02.40171502 29 40.038-20 37 25.18 19.76GVEE008G96
CK21X020 C2022 10 02.40685902 29 39.336-20 37 33.92 19.58GVEE008G96
CK21X020 C2022 10 02.41201702 29 38.634-20 37 44.44 19.90GVEE008G96
CK21X020 C2022 10 02.56668602 29 17.523-20 42 32.80 21.05wUEE008F51
CK21X020 C2022 10 02.57838002 29 15.918-20 42 54.40 20.95wUEE008F51
CK21X020 C2022 10 02.59006802 29 14.317-20 43 16.13 21.08wUEE008F51
CK21X020 C2022 10 02.60177002 29 12.704-20 43 37.84 21.02wUEE008F51
CK21X020 C2022 10 03.37242002 27 27.284-21 07 27.48 19.53GVEE008G96
CK21X020 C2022 10 03.37785202 27 26.496-21 07 37.49 19.75GVEE008G96
CK21X020 C2022 10 03.38329302 27 25.762-21 07 47.96 19.78GVEE008G96
CK21X020 C2022 10 03.38873102 27 24.988-21 07 57.72 19.61GVEE008G96
CK21X020 6C2022 10 20.02470 01 46 06.26 -28 43 42.8 VEE008W76
CK21X020 6C2022 10 20.02765 01 46 05.82 -28 43 46.8 VEE008W76
CK21X020 6C2022 10 20.03061 01 46 05.37 -28 43 51.1 20.5 GVEE008W76
CK21X020 1C2022 11 18.47001 00 38 07.29 -35 27 53.3 VEE008Q62
CK21X020 1C2022 11 18.47667 00 38 06.59 -35 27 55.1 20.7 GVEE008Q62
CK21X020 7C2022 11 23.29428400 29 48.628-35 50 26.51 21.4 GVEE008T14
CK21X020 7C2022 11 23.29618900 29 48.435-35 50 26.91 20.6 GVEE008T14
CK21X020 7C2022 11 23.29809500 29 48.247-35 50 27.41 21.8 GVEE008T14
Observer details:
215 Buchloe. Observer W. Hasubick. 0.44-m f/4.6 reflector + CCD.
568 Maunakea. Observers K. J. Meech, E. Bufanda, J. Kleyna, J. V. Keane.
Measurers M. Micheli, J. Kleyna. 3.6-m Canada-France-Hawaii Telescope +
CCD.
679 San Pedro Martir. Observer J. S. Silva-Cabrera. Measurer M. Micheli.
0.84-m reflector + CCD.
695 Kitt Peak. Observers R. A. Mastaler, J. V. Scotti. 2.3-m f/9 reflector +
CCD.
D35 Lulin Observatory. Observers Y. C. Cheng, W. J. Hou. Measurer Y. C.
Cheng. 1.0-m f/8.0 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith, M. Willman. Measurers S. Chastel, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau,
J. Fairlamb, H. Flewelling, C.-C. Lin, E. Magnier. 1.8-m Ritchey-Chretien
+ CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, K. Chambers, T. Dukes, T.
Lowe, A. Schultz, I. Smith, M. Willman. Measurers S. Chastel, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, C.-C. Lin, E. Magnier. 1.8-m
Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer J. B. Fazekas. Measurers E. J. Christensen,
D. Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller,
J. K. Hogan, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
Seaman, A. Serrano, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K
CCD.
H06 iTelescope Observatory, Mayhill. Observer H. Sato. 0.43-m f/6.8
astrograph + CCD + f/4.5 focal reducer.
Q62 iTelescope Observatory, Siding Spring. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD, 0.51-m f/6.8 astrograph + CCD + f/4.5 focal reducer.
T14 Canada-France-Hawaii Telescope, Maunakea. Observers K. J. Meech, J.
Kleyna, E. Bufanda, J. V. Keane. Measurers M. Micheli, K. J. Meech, J.
Kleyna. 3.6-m Canada-France-Hawaii Telescope + CCD.
V00 Kitt Peak-Bok. Observer R. A. Mastaler. Measurers M. J. Brucker, E. J.
Christensen, C. E. Woodward, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D.
Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. S.
McMillan, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos. 2.25-m
reflector + CCD.
V06 Catalina Sky Survey-Kuiper. Observers D. Rankin, H. Groeller. Measurers
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. 1.55-m reflector + 1K CCD.
W76 CHILESCOPE Observatory, Rio Hurtado. Observer H. Sato. 0.51-m f/6.8
astrograph + CCD.
Z84 Calar Alto-Schmidt. Observer E. Schwab. Measurers E. Schwab, D. Koschny,
M. Micheli, E. Petrescu, L. Conversi. 0.8-m f/3 Schmidt + CCD.
Orbital elements:
C/2021 X2 (Bok)
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5
T 2022 July 8.10442 TT Rudenko
q 2.9957085 (2000.0) P Q
z -0.0003083 Peri. 193.31491 +0.76779267 +0.38545525
+/-0.0000006 Node 228.82340 +0.63229058 -0.32687359
e 1.0009236 Incl. 137.16104 +0.10345549 -0.86288928
>From 95 observations 2021 Oct. 30-2022 Nov. 23, mean residual 0".5.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2024 02 01 21 11 24.6 -54 06 57 6.7845 6.0253 36.9 5.6 25.0
...
2024 02 16 21 19 46.7 -53 53 57 6.8318 6.1307 41.8 6.2 25.0
...
2024 02 24 21 24 00.6 -53 55 12 6.8365 6.1870 45.8 6.6 25.1
...
2024 03 01 21 27 00.7 -54 00 01 6.8314 6.2292 49.2 6.9 25.1
2024 03 02 21 27 29.6 -54 01 09 6.8298 6.2362 49.8 7.0 25.1
2024 03 03 21 27 58.3 -54 02 23 6.8281 6.2432 50.4 7.0 25.1
...
2024 03 09 21 30 42.9 -54 11 45 6.8138 6.2854 54.2 7.4 25.2
...
2024 03 17 21 33 59.3 -54 29 45 6.7851 6.3416 59.7 7.8 25.2
...
2024 04 01 21 38 36.9 -55 20 38 6.7073 6.4468 70.7 8.4 25.2
M. P. C. Staff (C) Copyright 2024 MPC M.P.E.C. 2024-E08
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