MPEC 2019-P93 : 2017 SJ20
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M.P.E.C. 2019-P93 Issued 2019 August 12, 16:32 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
2017 SJ20
Revision to MPEC 2017-S244
Additional Observations:
K17S20J C2014 03 05.46335011 54 05.923-14 59 24.21 20.4 GVEP093F51
K17S20J C2014 03 05.47571811 54 04.516-14 58 35.83 20.3 GVEP093F51
K17S20J C2014 03 23.34314 11 36 51.14 -02 51 31.6 20.7 VqEP093G96
K17S20J C2014 03 23.34822 11 36 50.87 -02 51 24.3 21.1 VqEP093G96
K17S20J C2014 03 23.35329 11 36 50.67 -02 51 17.1 21.7 VqEP093G96
K17S20J C2014 03 23.35838 11 36 50.53 -02 51 09.5 20.6 VqEP093G96
K17S20J C2014 03 24.40270 11 36 22.233-02 26 47.09 21.2 wLEP093F51
K17S20J C2014 03 24.41500 11 36 21.790-02 26 30.44 21.2 wLEP093F51
K17S20J C2014 03 24.42728 11 36 21.339-02 26 14.10 21.3 wLEP093F51
K17S20J C2014 03 24.43961 11 36 20.902-02 25 57.22 21.2 wLEP093F51
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe,
E. Magnier, A. Schultz, M. Willman, N. Primak, T. Goggia.
Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk,
P.-S. 1. S. Consortium. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer R. E. Hill. Measurers E. J. Christensen,
A. R. Gibbs, A. D. Grauer, R. E. Hill, J. A. Johnson, R. A. Kowalski,
S. M. Larson, F. C. Shelly. 1.5-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
140305 F51 2.92- 0.27- 140324 F51 1.76- 0.53- MPO428363 -0.00 days
Orbital elements:
2017 SJ20 Earth MOID = 0.0305 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 MPC
M 124.69295 (2000.0) P Q
n 0.24969350 Peri. 256.30446 -0.00624440 -0.99971000
a 2.4976479 Node 194.11520 +0.95037403 +0.00130152
e 0.6752833 Incl. 5.47254 +0.31104696 -0.02404626
P 3.95 H 22.3 G 0.15 U 1
Residuals in seconds of arc
140305 F51 0.1- 0.1- 170927 F51 0.1- 0.1+ 171017 474 0.3- 0.3-
140305 F51 0.0 0.0 170927 F51 0.2+ 0.5+ 171017 474 0.3+ 0.0
140323 G96 1.0+ 0.2+ 170928 F51 0.1+ 0.1+ 171017 474 1.2+ 1.2-
140323 G96 0.2- 0.2+ 170928 F51 0.0 0.1+ 171026 474 0.7+ 1.0-
140323 G96 0.4- 0.1+ 170928 F51 0.1- 0.1+ 171026 474 0.4+ 0.6+
140323 G96 0.3+ 0.4+ 170928 F51 0.0 0.1- 171026 474 0.1- 0.4-
140324 F51 0.2+ 0.4+ 170929 H21 (0.2- 1.7+) 171027 474 0.5- 0.1-
140324 F51 0.2+ 0.4+ 170929 H21 0.3- 1.4+ 171027 474 0.2- 0.3+
140324 F51 0.1- 0.1+ 170929 H21 (0.7- 1.5+) 171027 474 0.1- 0.1-
140324 F51 0.1- 0.2+ 170930 695 0.1- 0.2- 171110 474 0.3- 0.5-
170924 F51 0.2- 0.1+ 170930 695 0.2- 0.1+ 171110 474 0.1- 1.2+
170924 F51 0.1- 0.2+ 170930 695 0.1- 0.0 171110 474 0.0 0.7+
170927 F51 0.1- 0.3+ 171017 474 0.8- 0.7-
Ephemeris:
2017 SJ20 a,e,i = 2.50, 0.68, 5 q = 0.8110
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2019 07 13 16 44 11.3 -15 54 19 3.2225 4.0646 141.2 9.0 28.5
...
2019 07 28 16 37 07.4 -15 57 17 3.4159 4.0885 125.4 11.7 28.7
...
2019 08 05 16 35 02.1 -16 02 55 3.5345 4.1002 117.3 12.7 28.9
...
2019 08 11 16 34 14.3 -16 08 51 3.6285 4.1085 111.4 13.3 28.9
2019 08 12 16 34 10.1 -16 09 58 3.6445 4.1099 110.5 13.4 29.0
2019 08 13 16 34 07.0 -16 11 07 3.6606 4.1112 109.5 13.4 29.0
...
2019 08 19 16 34 09.8 -16 18 46 3.7586 4.1189 103.8 13.8 29.0
...
2019 08 27 16 35 09.6 -16 30 39 3.8921 4.1286 96.4 14.1 29.1
...
2019 09 11 16 39 40.0 -16 56 51 4.1441 4.1447 83.1 14.0 29.3
A. U. Tomatic (C) Copyright 2019 MPC M.P.E.C. 2019-P93
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