Central Bureau for Astronomical Telegrams
IAUC 2897: 1975 YA (FMO KOWAL); JUPITER XIII
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Read IAUC 2898
Circular No. 2897
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
1975 YA (FAST-MOVING OBJECT KOWAL)
Further positions have been reported as follows:
1976 UT R. A. (1950) Decl. mpv Observer
Jan. 3.12361 21 29.5 +60 25 13-14 Kowal
4.10625 21 25 01.55 +58 40 35.1 Giclas
4.12292 21 24 57.56 +58 38 58.4 "
C. Kowal (Hale Observatories).
H. L. Giclas (Lowell Observatory). Measurer: M. L. Kantz.
The following orbital elements, by B. G. Marsden, show that
this object has the smallest mean distance on record; its aphelion
distance is only 1.04 AU. Precise positions are desired.
T = 1976 Apr. 11.47 ET
Peri. = 155.49 e = 0.2496
Node = 93.09 1950.0 a = 0.8294 AU
Incl. = 32.29 n = 1.305
q = 0.6224 AU P = 0.76 year
1976 ET R. A. (1950) Decl. Delta r Mag.
Jan. 3 21 30.38 +60 39.5 0.077 0.986 14.4
8 21 15.46 +54 17.2
13 21 09.81 +51 16.6 0.168 0.957 16.2
18 21 06.42 +49 22.3
23 21 03.92 +47 52.8 0.256 0.922 17.1
28 21 01.92 +46 31.1
Feb. 2 21 00.27 +45 08.2 0.337 0.881 17.6
7 20 59.00 +43 37.8
12 20 58.23 +41 55.6 0.411 0.836 18.0
Mag. = 18.0 + 5 log Delta + 5 log r + 0.023 (phase angle)
JUPITER XIII
Precise positions by P. J. Shelus and J. D. Mulholland at the
McDonald Observatory (cf. IAUC 2841):
1975 UT R. A. (1950) Decl. Observer
Sept. 1.41458 1 30 16.88 + 8 08 05.3 Shelus
Oct. 8.33837 1 19 45.56 + 6 28 56.7 Mulholland
1976 January 7 (2897) Brian G. Marsden
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