Central Bureau for Astronomical Telegrams
IAUC 2950: 1976 AA; 1975h; LUNAR Occn OF JUPITER'S GALILEAN Sats
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Circular No. 2950
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
1976 AA
The followtng precise positions have been measured by C. Y.
Shao from plates taken by R. E. McCrosky with the 155-cm reflector
at the Harvard College Observatory's Agassiz Station:
1976 UT R. A. (1950) Decl.
Feb. 23.98194 1 42 29.48 +65 38 16.0
Mar. 8.01771 0 55 38.87 +66 43 29.0
The following improved orbital elements, by the undersigned,
are from observations Jan. 7 to Mar. 8, perturbations included:
T = 1976 May 20.1753 ET Epoch = 1976 May 22.0 ET
Peri. = 147.7709 e = 0.182399
Node = 108.0823 1950.0 a = 0.966469 AU
Incl. = 18.9132 n = 1.037343
q = 0.790186 AU P = 0.950 year
1976 ET R. A. (1950) Decl. Delta r Mag.
May 12 0 04.95 +32 52.9 0.368 0.793 18.0
17 0 19.04 +28 13.7
22 0 34.53 +23 49.7 0.398 0.790 18.1
27 0 51.08 +19 48.0
June 1 1 08.36 +16 13.1 0.442 0.796 18.2
6 1 26.09 +13 06.5
11 1 44.07 +10 28.2 0.495 0.810 18.3
16 2 02.12 + 8 16.2
21 2 20.12 + 6 28.0 0.553 0.831 18.4
26 2 37.94 + 5 00.2
July 1 2 55.50 + 3 49.6 0.612 0.857 18.6
6 3 12.74 + 2 53.2
11 3 29.65 + 2 08.4 0.667 0.887 18.7
16 3 46.21 + 1 32.8
21 4 02.42 + 1 04.5 0.716 0.918 18.8
COMET KOBAYASHI-BERGER-MILON (1975h)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
July 8.87188 21 26 07.56 + 2 10 23.5 6.5 Bruwer
8.88646 21 26 03.63 + 2 12 05.8 "
16.88160 20 22 50.34 +26 56 51.0 Fischer
16.89028 20 22 43.25 +26 59 06.9 "
17.88085 20 08 36.88 +31 15 29.1 "
17.89446 20 08 23.99 +31 19 07.6 "
22.89945 18 14 41.68 +51 51 21.3 "
22.92639 18 13 51.78 +51 56 20.7 "
23.85625 17 43 59.74 +54 32 26.3 "
23.86840 17 43 35.74 +54 34 09.6 "
31.84543 13 55 14.73 +56 18 40.7 "
31.87188 13 54 47.27 +56 17 10.1 "
Aug. 10.84375 12 16 07.14 +47 09 49.9 "
10.86003 12 16 01.88 +47 09 06.1 "
20.84549 11 33 28.93 +40 23 10.5 Ferreri
20.84688 11 33 28.58 +40 23 08.2 "
22.81076 11 26 45.90 +39 05 59.1 Fischer
22.82188 11 26 43.55 +39 05 30.7 "
Dec 4.32570 10 18 48.05 -55 41 21.0 Torres
7.31529 10 13 53.89 -57 30 13.4 "
30.20089 9 03 21.06 -67 56 21.5 Barros
31.22590 8 58 41.38 -68 13 40.6 "
J. A. Bruwer (South African Astronomical Observatory, Johannesburg
Outstation). Franklin-Adams camera, Hartbeespoort.
P. L. Fischer and P. Jackson (Vienna University Observatory). Measurer:
T. J. Kreidl.
W. Ferreri (Pino Torinese Observatory).
C. Torres and S. Barros (University of Chile, Cerro El Roble Station).
Dec. 4: coma 16" diameter, faint tail 15' long to north-northwest.
Dec. 30: coma 10", tail 25' to north-northwest.
LUNAR OCCULTATION OF JUPITER'S GALILEAN SATELLITES
D. W. Dunham, Cincinnati Observatory, communicates the following
prediction, computed by F. Fekel, University of Texas, using
data supplied by K. Aksnes and himself, of the reappearance of
Jupiter's Galilean satellites at the dark limb of the moon (3-percent
sunlit) on May 27. The columns headed dT_Z, dT_H and dT_R
give the differences between the times of emersion of the indicated
satellite and the center of Jupiter as observed at Zurich, Herstmonceux
and Rome; d gives the duration of emersion; the column dP
gives the difference in position angle at reappearance and dR.A. and
dDecl. the differences in apparent right ascension and declination.
Satellite dT_Z dT_H dT_R d dP dR.A. dDecl.
IV -9m4 -9m1 -9m7 2s1 -1o9 -20s0 -110"
III -7.8 -7.6 -8.0 2.3 -0.8 -16.7 - 79
I -2.6 -2.5 -2.7 1.6 -0.1 - 5.7 - 24
II +4.9 +4.7 +4.9 1.4 +0.4 +10.3 + 48
1976 May 12 (2950) Brian G. Marsden
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