[Iaude] MPEC X170: 2021 XK4 [a=1.01,e=0.30,i=10.9,H=26.3]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Thu Dec 9 06:52:55 EST 2021
M.P.E.C. 2021-X170 Issued 2021 December 9, 11:51 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2021 XK4
Observations:
K21X04K* C2021 12 08.17257801 43 04.25 +28 15 52.6 20.34GVEX170G96
K21X04K C2021 12 08.17827501 43 07.83 +28 17 03.3 20.78GVEX170G96
K21X04K C2021 12 08.18399901 43 11.46 +28 18 12.9 21.39GVEX170G96
K21X04K C2021 12 08.18967301 43 15.00 +28 19 22.9 20.77GVEX170G96
K21X04K KC2021 12 08.25768301 43 57.82 +28 32 58.7 20.68GVEX170I52
K21X04K KC2021 12 08.25965301 43 59.09 +28 33 22.2 20.60GVEX170I52
K21X04K KC2021 12 08.26162301 44 00.32 +28 33 45.3 20.66GVEX170I52
K21X04K KC2021 12 08.26359201 44 01.58 +28 34 08.4 20.85GVEX170I52
K21X04K KC2021 12 09.04080401 52 38.13 +30 52 19.4 21.0 VuEX170H21
K21X04K KC2021 12 09.04639501 52 41.05 +30 53 13.5 uEX170H21
K21X04K KC2021 12 09.04925001 52 42.56 +30 53 40.5 uEX170H21
K21X04K KC2021 12 09.06037401 52 48.40 +30 55 27.2 21.3 VuEX170H21
K21X04K KC2021 12 09.06836801 52 57.51 +30 56 52.9 21.25GVEX170I52
K21X04K KC2021 12 09.07004701 52 58.43 +30 57 09.1 20.76GVEX170I52
K21X04K KC2021 12 09.07172501 52 59.24 +30 57 25.2 21.02GVEX170I52
K21X04K KC2021 12 09.07340401 53 00.11 +30 57 41.8 20.85GVEX170I52
Observer details:
G96 Mt. Lemmon Survey. Observer R. A. Kowalski. 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. 1.5-m reflector + 10K CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers T. Linder, R. Holmes, L. Horn. 0.76-m f/3.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer 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.
Orbital elements:
2021 XK4 Earth MOID = 0.0049 AU
Epoch 2022 Jan. 21.0 TT = JDT 2459600.5 Veres
M 116.34451 (2000.0) P Q
n 0.97386484 Peri. 254.71846 +0.81335035 +0.55354625
a 1.0080226 Node 71.36092 -0.43440698 +0.78253602
e 0.3025425 Incl. 10.89023 -0.38697775 +0.28499810
P 1.01 H 26.37 G 0.15 U 8
Residuals in seconds of arc
211208 G96 0.0 0.0 211208 I52 0.0 0.0 211209 I52 0.3+ 0.0
211208 G96 0.1- 0.4+ 211208 I52 0.2+ 0.1+ 211209 I52 0.7+ 0.1-
211208 G96 0.2+ 0.5- 211209 H21 0.4- 0.3+ 211209 I52 0.2- 0.2-
211208 G96 0.2- 0.0 211209 H21 0.6- 0.4+ 211209 I52 0.2- 0.0
211208 I52 0.1- 0.3- 211209 H21 0.4- 0.1-
211208 I52 0.2+ 0.1+ 211209 H21 0.0 0.1-
Ephemeris:
2021 XK4 a,e,i = 1.01, 0.30, 11 q = 0.7031
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 11 09 15 42 12.0 -48 13 51 0.1650 0.8567 32.8 141.2 29.1
...
2021 11 24 16 42 05.7 -55 03 02 0.06161 0.9379 35.6 142.3 27.3
...
2021 12 02 22 16 52.3 -40 11 11 0.01809 0.9809 73.2 105.7 21.5
...
2021 12 08 01 40 57.3 +27 39 18 0.03784 1.0124 135.3 43.1 21.0
2021 12 09 01 52 08.5 +30 46 18 0.04388 1.0175 137.0 41.3 21.2
2021 12 10 02 01 11.2 +33 05 05 0.05009 1.0227 138.1 40.1 21.5
...
2021 12 16 02 33 01.7 +39 38 18 0.08906 1.0527 138.7 38.1 22.8
...
2021 12 24 02 54 23.7 +42 18 32 0.1434 1.0908 135.7 39.0 23.9
...
2022 01 08 03 22 54.0 +43 27 24 0.2513 1.1552 128.0 42.1 25.3
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-X170
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