MPEC 2023-K167 : 2021 JK4
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M.P.E.C. 2023-K167 Issued 2023 May 28, 14:07 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
2021 JK4
Revision to MPEC 2021-J168
Additional Observations:
K21J04K C2021 04 16.32118413 29 19.239-23 35 51.07 21.79GVEK167F52
K21J04K C2021 04 16.35455113 29 16.617-23 34 26.67 23.07GVEK167F52
K21J04K C2021 04 16.37127213 29 15.265-23 33 43.50 21.89GVEK167F52
K21J04K C2021 05 04.40206513 09 35.755-09 15 23.96 22.30GVEK167F51
K21J04K C2021 05 04.41494913 09 35.047-09 14 45.87 22.19GVEK167F51
K21J04K C2021 05 14.31147613 03 32.398-01 38 57.40 22.62GVEK167F51
K21J04K C2021 05 14.32189613 03 32.079-01 38 31.07 22.57GVEK167F51
K21J04K C2021 05 14.33233713 03 31.798-01 38 04.46 22.55GVEK167F51
K21J04K C2023 05 01.60870417 29 25.187+02 15 12.90 23.00GVEK167F52
K21J04K C2023 05 26.38213517 24 40.834+27 16 45.56 22.03GVEK167F51
K21J04K C2023 05 26.41912317 24 38.944+27 18 49.23 21.66GVEK167F51
K21J04K KC2023 05 27.34479117 23 56.270+28 09 28.70 22.57GVEK167I52
K21J04K KC2023 05 27.35252117 23 55.840+28 09 53.90 VEK167I52
K21J04K KC2023 05 27.36798317 23 55.020+28 10 44.20 VEK167I52
K21J04K 1C2023 05 28.35067917 23 08.243+29 03 33.16 22.50GVEK167G96
K21J04K 1C2023 05 28.35587117 23 07.962+29 03 49.32 22.25GVEK167G96
K21J04K 1C2023 05 28.36107717 23 07.663+29 04 05.41 22.19GVEK167G96
K21J04K 1C2023 05 28.36625917 23 07.426+29 04 21.50 21.70GVEK167G96
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, P.
Minguez, A. Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M.
Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien +
CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, K. Chambers, T. Dukes, T.
Lowe, P. Minguez, A. Schultz, I. Smith. Measurers S. Chastel, J.
Fairlamb, M. Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m
Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer G. J. Leonard. 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.
I52 Steward Observatory, Mt. Lemmon Station. Observer A. Serrano. 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. 1.0-m prime focus + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
210416 F52 0.00+ 0.00+ 230528 G96 0.71+ 0.15+ MPO740960 -0.01 days
Orbital elements:
2021 JK4 Earth MOID = 0.3885 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 264.03031 (2000.0) P Q
n 0.52301867 Peri. 102.05404 +0.67558679 +0.67940417
a 1.5256606 Node 216.34050 -0.70719907 +0.70695899
e 0.1860446 Incl. 28.89542 +0.20845136 +0.19651708
P 1.88 H 21.77 G 0.15 U 2
Residuals in seconds of arc
210416 F52 0.3- 0.1+ 210510 H01 0.1- 0.1- 210518 568 0.0 0.0
210416 F52 0.0 0.2- 210510 H01 0.1+ 0.0 210518 568 0.1- 0.3+
210416 F52 0.2- 0.4+ 210511 H01 0.3+ 0.0 230501 F52 0.1+ 0.0
210504 F51 0.2- 0.1- 210511 H01 0.1- 0.1+ 230526 F51 0.1- 0.0
210504 F51 0.0 0.3+ 210511 H01 0.1+ 0.2+ 230526 F51 0.1+ 0.1+
210508 F51 0.0 0.1+ 210511 H01 0.1+ 0.0 230527 I52 0.1- 0.0
210508 F51 0.1- 0.0 210514 F51 0.1+ 0.0 230527 I52 0.2- 0.0
210508 F51 0.1- 0.1+ 210514 F51 0.2- 0.3- 230527 I52 0.1- 0.0
210509 568 0.0 0.0 210514 F51 0.0 0.3- 230528 G96 0.0 0.4+
210509 568 0.0 0.0 210518 V00 0.0 0.1- 230528 G96 0.1+ 0.0
210509 568 0.0 0.0 210518 V00 0.0 0.1+ 230528 G96 0.0 0.5-
210510 H01 0.1- 0.1- 210518 V00 0.2+ 0.1+ 230528 G96 0.7+ 1.0-
210510 H01 0.1+ 0.0 210518 V00 0.3+ 0.0
Ephemeris:
2021 JK4 a,e,i = 1.53, 0.19, 29 q = 1.2418
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 04 28 17 27 43.8 -01 09 28 0.5663 1.4464 131.7 31.3 22.7
...
2023 05 13 17 30 48.9 +13 52 00 0.5035 1.4075 134.0 31.1 22.4
...
2023 05 21 17 28 05.6 +22 05 54 0.4920 1.3873 131.4 33.2 22.3
...
2023 05 27 17 24 12.2 +27 50 40 0.4925 1.3725 128.1 35.5 22.4
2023 05 28 17 23 25.2 +28 44 48 0.4932 1.3701 127.4 36.0 22.4
2023 05 29 17 22 36.2 +29 37 50 0.4941 1.3677 126.8 36.4 22.4
...
2023 06 04 17 17 04.4 +34 30 56 0.5028 1.3535 122.7 39.1 22.5
...
2023 06 12 17 08 32.5 +39 49 05 0.5210 1.3354 117.0 42.6 22.6
...
2023 06 27 16 52 50.3 +46 04 26 0.5645 1.3046 107.8 47.9 22.9
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-K167
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