[Iaude] MPEC Y21: 2017 AL4 [a=1.45,e=0.31,i=13.2,H=23.09]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Sun Dec 17 09:09:27 EST 2023
M.P.E.C. 2023-Y21 Issued 2023 December 17, 14:08 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2017 AL4
Revision to MPEC 2017-A37
Additional Observations:
K17A04L C2023 07 26.44063422 17 19.705+24 11 16.56 23.05GVEY021F52
K17A04L C2023 07 26.45279922 17 19.806+24 11 59.43 23.34GVEY021F52
K17A04L C2023 07 26.46516322 17 19.932+24 12 42.47 23.11GVEY021F52
K17A04L C2023 10 31.58640110 31 43.832+57 47 34.31 22.00GVEY021F51
K17A04L C2023 10 31.59927110 31 42.867+57 46 50.42 21.75GVEY021F51
K17A04L C2023 11 24.57323610 10 46.079+32 43 12.16 22.11GVEY021F51
K17A04L C2023 11 24.58290310 10 45.328+32 42 36.20 22.09GVEY021F51
K17A04L C2023 11 24.59903210 10 44.095+32 41 35.22 21.68GVEY021F51
K17A04L C2023 11 24.60997010 10 43.249+32 40 53.89 22.05GVEY021F51
K17A04L C2023 12 15.53156809 40 02.111+11 14 58.32 21.73wXEY021F52
K17A04L C2023 12 15.55505409 39 58.927+11 13 39.09 21.40wXEY021F52
K17A04L 0C2023 12 16.65536409 37 43.262+10 12 02.66 21.75GVEY021T12
K17A04L 0C2023 12 16.65669409 37 43.082+10 11 58.15 22.00GVEY021T12
K17A04L 0C2023 12 16.65807409 37 42.891+10 11 53.53 21.85GVEY021T12
K17A04L 0C2023 12 16.65950709 37 42.691+10 11 48.77 21.75GVEY021T12
K17A04L 1C2023 12 17.43369509 36 07.520+09 28 55.31 21.47GVEY021G96
K17A04L 1C2023 12 17.43881209 36 06.844+09 28 38.86 21.63GVEY021G96
K17A04L 1C2023 12 17.44393309 36 06.131+09 28 22.12 21.46GVEY021G96
K17A04L 1C2023 12 17.44906809 36 05.360+09 28 04.37 22.01GVEY021G96
K17A04L C2023 12 17.47185309 36 02.060+09 26 49.06 21.4 GVEY021H01
K17A04L C2023 12 17.47695109 36 01.352+09 26 32.29 21.5 GVEY021H01
K17A04L C2023 12 17.48617609 36 00.060+09 26 01.84 21.1 GVEY021H01
K17A04L C2023 12 17.49411709 35 58.946+09 25 35.58 21.6 GVEY021H01
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Herman, T. Lowe, P. Minguez, A.
Schultz, I. Smith. Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
Weryk. 1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Herman, T. Lowe, P. Minguez, A.
Schultz, I. Smith. Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer A. R. Gibbs. Measurers E. C. Beshore, 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, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro. Observers W. H. Ryan, E. V. Ryan.
Measurer W. H. Ryan. 2.4-m f/8.9 Ritchey-Chretien + CCD.
T12 University of Hawaii 88-inch telescope, Maunakea. Observer D. J. Tholen.
2.24-m f/10.1 reflector + 2112 x 2112 pixels STA1600 10k CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
230726 F52 0.37- 0.15- 231217 H01 0.31- 0.23- E2023-R13 -0.12 days
Orbital elements:
2017 AL4 Earth MOID = 0.0880 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 336.46356 (2000.0) P Q
n 0.56296843 Peri. 127.94144 +0.75939595 -0.60915674
a 1.4526022 Node 270.77272 +0.50185686 +0.77199910
e 0.3114057 Incl. 13.21433 +0.41407424 +0.18150881
P 1.75 H 23.09 G 0.15 U 0
Residuals in seconds of arc
170103 F51 0.3+ 0.1+ 170202 T12 0.0 0.0 231215 F52 0.1+ 0.1+
170103 F51 0.0 0.3+ 170202 T12 0.0 0.0 231215 F52 0.2- 0.0
170103 F51 0.0 0.2+ 170206 705 0.2+ 0.0 231216 T12 0.1+ 0.0
170103 F51 0.1+ 0.1- 170206 705 0.6+ 0.2+ 231216 T12 0.2+ 0.0
170104 568 0.0 0.0 170206 705 0.1+ 0.3- 231216 T12 0.2+ 0.0
170104 568 0.0 0.0 230726 F52 0.1- 0.1- 231216 T12 0.1+ 0.0
170104 568 0.0 0.0 230726 F52 0.2- 0.2+ 231217 G96 0.4- 0.2-
170106 807 0.2+ 0.4+ 230726 F52 0.1+ 0.1- 231217 G96 0.2+ 0.1+
170106 807 0.4- 0.0 231031 F51 0.1+ 0.2- 231217 G96 0.3+ 0.2+
170106 807 0.0 0.2+ 231031 F51 0.2- 0.4+ 231217 G96 0.5- 0.6-
170108 H21 0.2- 0.3- 231124 F51 0.1- 0.1- 231217 H01 0.0 0.0
170108 H21 0.1- 0.7- 231124 F51 0.2- 0.3+ 231217 H01 0.1+ 0.0
170108 H21 0.3- 0.9- 231124 F51 0.0 0.0 231217 H01 0.1+ 0.0
170108 H21 0.1- 0.5- 231124 F51 0.1+ 0.1- 231217 H01 0.0 0.1-
Ephemeris:
2017 AL4 a,e,i = 1.45, 0.31, 13 q = 1.0003
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 11 17 10 17 49.5 +40 46 23 0.2212 1.0244 93.0 74.6 22.5
...
2023 12 02 10 02 09.5 +24 51 15 0.2173 1.0631 105.0 63.6 22.2
...
2023 12 10 09 50 14.4 +16 37 51 0.2187 1.0897 113.2 56.2 22.0
...
2023 12 16 09 39 04.5 +10 48 47 0.2221 1.1118 119.9 50.1 21.9
2023 12 17 09 37 01.5 +09 53 07 0.2229 1.1156 121.1 49.1 21.9
2023 12 18 09 34 55.3 +08 58 17 0.2238 1.1195 122.2 48.0 21.9
...
2023 12 24 09 21 17.5 +03 49 38 0.2309 1.1436 129.2 41.8 21.8
...
2024 01 01 09 01 01.4 -01 55 13 0.2459 1.1775 138.0 34.0 21.8
...
2024 01 16 08 22 06.0 -08 29 37 0.2936 1.2450 149.2 23.9 22.0
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-Y21
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