MPEC 2017-Y103: 2017 YR4
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M.P.E.C. 2017-Y103 Issued 2017 Dec. 26, 19:19 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 YR4
Observations:
K17Y04R* C2017 12 24.19941 03 10 50.01 +10 33 06.0 18.8 GUEY103G96
K17Y04R C2017 12 24.20588 03 10 55.85 +10 34 00.9 18.9 GUEY103G96
K17Y04R C2017 12 24.21772 03 11 06.49 +10 35 41.5 19.1 GUEY103G96
K17Y04R C2017 12 24.22612 03 11 14.05 +10 36 53.3 18.8 GUEY103G96
K17Y04R C2017 12 24.22681 03 11 14.68 +10 36 59.0 18.2 GUEY103G96
K17Y04R C2017 12 24.22692 03 11 14.77 +10 37 00.1 18.5 GUEY103G96
K17Y04R C2017 12 24.22769 03 11 15.47 +10 37 06.7 18.6 GUEY103G96
K17Y04R C2017 12 24.26553 03 11 49.73 +10 42 26.7 18.3 GUEY103V06
K17Y04R C2017 12 24.26589 03 11 50.06 +10 42 30.3 18.3 GUEY103V06
K17Y04R C2017 12 24.26625 03 11 50.37 +10 42 33.3 19.8 GUEY103V06
K17Y04R C2017 12 24.26661 03 11 50.67 +10 42 35.6 19.1 GUEY103V06
K17Y04R C2017 12 24.29744 03 12 18.82 +10 46 56.2 19.1 GUEY103V06
K17Y04R C2017 12 24.29851 03 12 19.79 +10 47 05.6 18.9 GUEY103V06
K17Y04R C2017 12 24.29929 03 12 20.53 +10 47 11.7 19.0 GUEY103V06
K17Y04R C2017 12 24.29965 03 12 20.82 +10 47 14.5 19.2 GUEY103V06
K17Y04R C2017 12 24.30036 03 12 21.46 +10 47 19.8 19.3 GUEY103V06
K17Y04R KC2017 12 24.84895 03 21 25.26 +12 04 52.3 19.2 VqEY103595
K17Y04R KC2017 12 24.85468 03 21 30.58 +12 05 40.1 19.3 VqEY103595
K17Y04R KC2017 12 24.86040 03 21 35.95 +12 06 29.1 19.0 VqEY103595
K17Y04R KC2017 12 24.88049 03 21 55.36 +12 09 20.7 19.2 GUEY103203
K17Y04R KC2017 12 24.90078 03 22 14.38 +12 12 12.5 18.9 GUEY103203
K17Y04R KC2017 12 25.08371 03 25 22.73 +12 38 27.1 18.8 RqEY103H36
K17Y04R KC2017 12 25.08850 03 25 27.26 +12 39 08.1 18.6 RqEY103H36
K17Y04R KC2017 12 25.09331 03 25 31.80 +12 39 49.5 18.5 RqEY103H36
K17Y04R KC2017 12 25.15419 03 26 30.30 +12 48 53.6 oEY103711
K17Y04R KC2017 12 25.15605 03 26 32.07 +12 49 09.0 oEY103711
K17Y04R KC2017 12 25.15786 03 26 33.78 +12 49 24.7 oEY103711
K17Y04R KC2017 12 25.15959 03 26 35.36 +12 49 38.9 oEY103711
K17Y04R C2017 12 25.18584 03 27 01.14 +12 53 18.8 19.7 RoEY103926
K17Y04R C2017 12 25.18837 03 27 03.50 +12 53 40.4 19.6 RoEY103926
K17Y04R C2017 12 25.19090 03 27 05.83 +12 54 01.9 19.6 RoEY103926
K17Y04R C2017 12 25.19481 03 27 09.48 +12 54 31.7 19.4 GUEY103G96
K17Y04R C2017 12 25.19993 03 27 14.27 +12 55 15.1 19.1 GUEY103G96
K17Y04R C2017 12 25.20505 03 27 19.05 +12 55 58.5 18.5 GUEY103G96
K17Y04R C2017 12 25.21016 03 27 23.80 +12 56 42.0 18.6 GUEY103G96
K17Y04R C2017 12 25.21129 03 27 24.90 +12 56 51.1 18.0 GUEY103I52
K17Y04R C2017 12 25.21147 03 27 25.07 +12 56 52.8 17.9 GUEY103I52
K17Y04R C2017 12 25.21166 03 27 25.24 +12 56 54.6 18.1 GUEY103I52
K17Y04R C2017 12 25.21184 03 27 25.41 +12 56 56.1 18.1 GUEY103I52
K17Y04R KC2017 12 25.76858 03 36 53.33 +14 14 16.1 19.2 RqEY103113
K17Y04R KC2017 12 25.77436 03 36 59.01 +14 15 03.5 qEY103113
K17Y04R KC2017 12 25.78014 03 37 04.52 +14 15 53.6 19.1 RqEY103113
K17Y04R C2017 12 25.86139 03 38 23.05 +14 27 17.0 qEY103246
K17Y04R C2017 12 25.86152 03 38 23.29 +14 27 17.1 qEY103246
K17Y04R C2017 12 25.86814 03 38 29.67 +14 28 16.5 18.8 RqEY103246
K17Y04R C2017 12 25.86835 03 38 29.95 +14 28 18.6 qEY103246
K17Y04R C2017 12 25.86848 03 38 29.99 +14 28 19.8 qEY103246
K17Y04R C2017 12 25.86859 03 38 30.14 +14 28 20.7 qEY103246
K17Y04R C2017 12 26.12499 03 42 58.60 +15 04 37.2 19.3 GUEY103I52
K17Y04R C2017 12 26.12518 03 42 58.74 +15 04 37.8 19.1 GUEY103I52
K17Y04R C2017 12 26.12536 03 42 58.94 +15 04 39.3 19.1 GUEY103I52
K17Y04R C2017 12 26.12799 03 43 01.44 +15 05 02.1 19.1 GUEY103I52
K17Y04R C2017 12 26.12890 03 43 01.21 +15 05 16.7 oEY103711
K17Y04R C2017 12 26.13063 03 43 02.85 +15 05 31.4 oEY103711
K17Y04R C2017 12 26.13253 03 43 04.74 +15 05 46.8 oEY103711
K17Y04R C2017 12 26.13423 03 43 06.32 +15 06 01.3 oEY103711
Observer details:
113 Volkssternwarte Drebach, Schoenbrunn. Observer G. Lehmann. 0.5-m f/4.6
reflector + CCD.
203 GiaGa Observatory. Observers S. Foglia, G. Galli. Measurer G. Galli.
0.28-m f/6.8 Schmidt-Cassegrain + CCD.
246 Klet Observatory-KLENOT. Observers M. Tichy, J. Ticha. Measurer M. Tichy.
1.06-m KLENOT Telescope + CCD.
595 Farra d'Isonzo. Observers E. Pettarin, F. Piani. Measurer E. Pettarin.
0.61-m f/4.0 reflector + CCD.
711 McDonald Observatory. Observer J. G. Ries. 2.1-m reflector + CCD + focal
reducer.
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 G. J. Leonard. 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.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer R. A. Kowalski.
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.
V06 Catalina Sky Survey-Kuiper. Observer A. R. Gibbs. 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. 1.55-m reflector + CCD.
Orbital elements:
2017 YR4 Earth MOID = 0.0295 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 320.87972 (2000.0) P Q
n 0.39438472 Peri. 339.76267 +0.23347621 -0.97097763
a 1.8415747 Node 96.70787 +0.89915845 +0.19528244
e 0.4524682 Incl. 2.99423 +0.37013908 +0.13808411
P 2.50 H 24.2 G 0.15 U 5
Residuals in seconds of arc
171224 G96 0.3- 0.3- 171224 203 0.6- 0.2+ 171225 I52 0.2+ 0.0
171224 G96 0.2+ 0.4- 171224 203 0.2- 0.1- 171225 113 0.9+ 1.0+
171224 G96 0.1+ 0.5- 171225 H36 0.5+ 0.4+ 171225 113 1.7+ 0.6-
171224 G96 0.1+ 0.0 171225 H36 0.9+ 0.3+ 171225 113 0.0 0.7+
171224 G96 0.3+ 0.2- 171225 H36 1.2+ 0.5+ 171225 246 (1.0- 3.1-)
171224 G96 0.1+ 0.0 171225 711 0.7- 1.2+ 171225 246 (0.7+ 4.1-)
171224 G96 0.2+ 0.1+ 171225 711 0.2- 0.7+ 171225 246 0.3+ 0.2+
171224 V06 0.9+ 0.3- 171225 711 0.2+ 1.0+ 171225 246 1.4+ 0.5+
171224 V06 1.0+ 0.3+ 171225 711 0.3- 0.5+ 171225 246 0.2+ 0.6+
171224 V06 0.7+ 0.2+ 171225 926 0.1- 0.0 171225 246 0.8+ 0.6+
171224 V06 0.3+ 0.5- 171225 926 0.1- 0.1+ 171226 I52 0.3+ 0.8+
171224 V06 0.4+ 0.2+ 171225 926 0.5- 0.1+ 171226 I52 0.3- 0.1-
171224 V06 0.3+ 0.6+ 171225 G96 0.2- 0.2- 171226 I52 0.1+ 0.2-
171224 V06 0.6+ 0.2+ 171225 G96 0.1- 0.2- 171226 I52 0.5- 0.6+
171224 V06 0.0 0.1- 171225 G96 0.1- 0.2- 171226 711 0.2- 0.2+
171224 V06 0.2- 0.7- 171225 G96 0.4- 0.1+ 171226 711 0.5- 0.4+
171224 595 0.3+ 1.2+ 171225 I52 0.3+ 0.3- 171226 711 0.4+ 0.1-
171224 595 0.2- 0.2+ 171225 I52 0.3+ 0.2- 171226 711 0.3- 0.2+
171224 595 0.2+ 0.6+ 171225 I52 0.2+ 0.0
Ephemeris:
2017 YR4 a,e,i = 1.84, 0.45, 3 q = 1.0083
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 11 26 23 53 09.2 -19 11 08 0.1160 1.0253 106.2 67.6 22.0
...
2017 12 11 00 49 12.5 -11 34 53 0.07245 1.0084 107.1 69.0 20.9
...
2017 12 19 01 58 25.0 -00 45 34 0.05346 1.0114 119.5 57.9 20.0
...
2017 12 25 03 23 54.6 +12 27 53 0.04684 1.0190 138.3 39.9 19.2
2017 12 26 03 40 44.6 +14 48 13 0.04676 1.0207 142.0 36.4 19.1
2017 12 27 03 57 58.8 +17 03 53 0.04700 1.0226 145.6 32.9 19.0
...
2018 01 02 05 38 29.6 +27 06 36 0.05502 1.0362 163.5 15.6 18.8
...
2018 01 10 07 10 41.0 +31 21 05 0.07820 1.0606 170.2 9.1 19.4
...
2018 01 25 08 21 39.4 +30 52 54 0.1410 1.1229 168.1 10.4 20.9
A. U. Tomatic (C) Copyright 2017 MPC M.P.E.C. 2017-Y103
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