MPEC 2018-A21 : 2017 YS8
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M.P.E.C. 2018-A21 Issued 2018 Jan. 6, 22:21 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 YS8
Observations:
K17Y08S C2017 12 30.43171 13 20 01.48 +41 05 04.0 19.9 GUEA021G96
K17Y08S C2017 12 30.43693 13 20 02.09 +41 05 01.0 19.6 GUEA021G96
K17Y08S C2017 12 30.44214 13 20 02.57 +41 04 59.3 UEA021G96
K17Y08S C2017 12 30.44734 13 20 03.32 +41 04 55.2 19.7 GUEA021G96
K17Y08S* C2017 12 30.47368 13 20 06.66 +41 04 38.2 UEA021G96
K17Y08S C2017 12 30.47828 13 20 07.10 +41 04 35.9 20.2 GUEA021G96
K17Y08S C2017 12 30.48285 13 20 07.69 +41 04 32.8 20.4 GUEA021G96
K17Y08S C2017 12 30.48740 13 20 08.22 +41 04 30.3 20.2 GUEA021G96
K17Y08S C2017 12 30.52837 13 20 13.15 +41 04 04.1 20.1 GUEA021I52
K17Y08S C2017 12 30.52985 13 20 13.33 +41 04 03.2 20.1 GUEA021I52
K17Y08S C2017 12 30.53133 13 20 13.52 +41 04 02.2 19.7 GUEA021I52
K17Y08S C2017 12 30.53282 13 20 13.70 +41 04 01.0 19.8 GUEA021I52
K17Y08S C2017 12 31.44178 13 22 11.96 +40 53 36.5 19.4 RoEA021926
K17Y08S C2017 12 31.45247 13 22 13.30 +40 53 29.8 19.5 RoEA021926
K17Y08S C2017 12 31.46314 13 22 14.61 +40 53 23.0 19.6 RoEA021926
K17Y08S C2017 12 31.48897 13 22 17.76 +40 53 06.4 19.5 RoEA021926
K17Y08S C2017 12 31.49958 13 22 19.07 +40 52 59.5 19.3 RoEA021926
K17Y08S C2017 12 31.51431 13 22 20.87 +40 52 49.6 19.4 RoEA021926
K17Y08S C2018 01 05.44278 13 33 30.34 +39 49 44.6 19.6 RoEA021926
K17Y08S C2018 01 05.45815 13 33 32.40 +39 49 32.0 19.7 RoEA021926
K17Y08S C2018 01 05.46451 13 33 33.28 +39 49 26.3 19.5 GUEA021I52
K17Y08S C2018 01 05.46614 13 33 33.44 +39 49 25.3 19.5 GUEA021I52
K17Y08S C2018 01 05.46766 13 33 33.69 +39 49 24.1 19.6 RoEA021926
K17Y08S C2018 01 05.46942 13 33 33.87 +39 49 22.1 20.2 GUEA021I52
K17Y08S C2018 01 05.46984 13 33 33.97 +39 49 22.7 19.5 RoEA021926
K17Y08S C2018 01 05.47115 13 33 34.12 +39 49 21.5 19.5 GUEA021I52
K17Y08S C2018 01 05.47843 13 33 35.16 +39 49 15.8 19.6 RoEA021926
K17Y08S C2018 01 05.49010 13 33 36.68 +39 49 06.2 19.4 RoEA021926
K17Y08S C2018 01 06.43988 13 35 54.02 +39 35 13.1 19.3 RoEA021926
K17Y08S C2018 01 06.44027 13 35 54.03 +39 35 12.0 19.2 GUEA021I52
K17Y08S C2018 01 06.44201 13 35 54.26 +39 35 10.5 18.7 GUEA021I52
K17Y08S C2018 01 06.44375 13 35 54.52 +39 35 09.0 19.8 GUEA021I52
K17Y08S C2018 01 06.44550 13 35 54.74 +39 35 07.8 19.3 GUEA021I52
K17Y08S C2018 01 06.45008 13 35 55.43 +39 35 04.5 19.6 RoEA021926
K17Y08S C2018 01 06.46376 13 35 57.30 +39 34 53.3 19.5 RoEA021926
Observer details:
926 Tenagra II Observatory. Observers M. Schwartz, P. R. Holvorcem. Measurer
M. Schwartz. 0.81-m f/7 Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer D. C. Fuls. Measurers E. J. Christensen,
D. C. Fuls, A. R. Gibbs, A. D. Grauer, J. A. Johnson, R. A. Kowalski,
S. M. Larson, G. J. Leonard, R. G. Matheny, R. L. Seaman, F. C. Shelly.
1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers R. G. Matheny,
D. C. Fuls. Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs,
A. D. Grauer, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. G. Matheny, R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.
Orbital elements:
2017 YS8 PHA, Earth MOID = 0.0410 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 92.14598 (2000.0) P Q
n 1.21161986 Peri. 302.34679 -0.02390453 +0.93981123
a 0.8714152 Node 321.36932 -0.63027445 -0.27882533
e 0.3884210 Incl. 33.09195 -0.77600431 +0.19751274
P 0.81 H 19.5 G 0.15 U 9
Residuals in seconds of arc
171230 G96 0.6+ 0.8- 171231 926 0.1+ 0.0 180105 926 0.0 0.1+
171230 G96 0.2+ 0.6- 171231 926 0.2+ 0.1+ 180105 I52 0.2- 0.3+
171230 G96 1.6- 0.9+ 171231 926 0.2+ 0.2+ 180105 926 0.4+ 0.1+
171230 G96 0.4- 0.0 171231 926 0.1- 0.4+ 180105 926 0.0 0.0
171230 G96 1.1+ 0.6- 171231 926 0.1+ 0.4+ 180106 926 0.2+ 0.2+
171230 G96 0.3- 0.0 171231 926 0.1+ 0.2+ 180106 I52 0.1- 0.3-
171230 G96 0.1+ 0.3- 180105 926 0.2+ 0.5+ 180106 I52 0.2- 0.3-
171230 G96 0.1- 0.1+ 180105 926 0.0 0.1+ 180106 I52 0.0 0.4-
171230 I52 0.1- 0.1+ 180105 I52 0.4+ 0.2- 180106 I52 0.3- 0.1-
171230 I52 0.1- 0.1+ 180105 I52 0.2- 0.1+ 180106 926 0.2+ 0.1+
171230 I52 0.0 0.1+ 180105 926 0.1+ 0.2- 180106 926 0.0 0.3+
171230 I52 0.1+ 0.1- 180105 I52 0.4- 0.5-
Ephemeris:
2017 YS8 a,e,i = 0.87, 0.39, 33 q = 0.5329
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 12 07 12 32 09.2 +44 40 26 0.6731 1.1917 89.9 55.8 21.0
...
2017 12 22 13 02 34.4 +42 29 48 0.5301 1.1575 95.0 57.9 20.5
...
2017 12 30 13 19 04.8 +41 09 55 0.4476 1.1319 97.4 59.5 20.2
...
2018 01 05 13 32 26.2 +39 55 59 0.3836 1.1093 98.9 61.1 19.8
2018 01 06 13 34 48.7 +39 41 45 0.3727 1.1053 99.1 61.5 19.8
2018 01 07 13 37 14.8 +39 26 46 0.3619 1.1011 99.3 61.8 19.7
...
2018 01 13 13 53 30.7 +37 35 57 0.2961 1.0747 99.9 64.4 19.3
...
2018 01 21 14 23 37.0 +33 15 56 0.2079 1.0351 98.4 70.2 18.6
...
2018 02 05 17 14 59.7 -09 53 55 0.07777 0.9472 58.2 117.8 18.5
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-A21
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