Central Bureau for Astronomical Telegrams
IAUC 2861: 1975k; Poss. COMET GEHRELS; OX-192; N Aql 1975
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Circular No. 2861
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
COMET SUZUKI-SAIGUSA-MORI (1975k)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
Oct. 8.79097 11 13 24.45 +43 28 07.8 8.0 Seki
8.82882 11 13 26.75 +43 27 55.7 "
20.17036 11 37 31.05 +40 12 39.6 Milet
20.17416 11 37 32.00 +40 12 30.0 "
20.80590 11 40 20.59 +39 44 55.7 8 Seki
20.81719 11 40 23.53 +39 44 25.5 "
20.81806 11 40 23.81 +39 44 18.6 Koishikawa
21.43403 11 43 25.37 +39 13 28.1 A'Hearn
21.82898 11 45 32.81 +38 51 36.0 Seki
24.81863 12 07 41.03 +34 35 34.4 Koishikawa
24.83484 12 07 50.58 +34 33 34.7 "
25.78345 12 18 10.46 +32 17 21.6 5 "
25.80333 12 18 24.71 +32 14 08.3 Kasahara
25.80833 12 18 29.05 +32 13 20.2 "
25.82326 12 18 39.43 +32 10 45.0 Koishikawa
26.82297 12 32 19.73 +28 53 08.8 6 Tomita
26.82517 12 32 21.71 +28 52 40.0 "
28.51910 13 04 47.00 +19 47 07.8 Giclas
T. Seki (Kochi Observatory, Geisei Station).
B. Milet (Nice Observatory).
M. Koishikawa (Sendai Observatory, Ayashi Station). 20-cm f/5.5
reflector. From Nihondaira Obs. Circ. Nos. 705 and 708.
M. F. A'Hearn (University of Maryland). MOTS-40 camera.
S. Kasahara (JCPM Kimachi Station). Long. = -140o51'49", Lat. =
+38o16'29", h = 50 m. From Nihondaira Obs. Circ. No. 708.
K. Tomita (Tokyo Astronomical Observatory, Dodaira Station). 50-cm
Schmidt camera.
H. L. Giclas (Lowell Observatory). Measurer: M. L. Kantz.
The following elliptical elements, by B. G. Marsden, satisfy
43 observations Oct. 6 to 28 within about 3":
T = 1975 Oct. 15.342 ET Peri. = 152.004
e = 0.98412 Node = 216.109 1950.0
q = 0.83804 AU Incl. = 118.227
1975/76 ET R. A. (1950) Decl. Delta r m1
Nov. 14 21 18.24 -53 41.9 0.502 0.999 9.0
19 21 38.53 -52 45.2
24 21 50.60 -52 04.5 0.847 1.104 10.6
29 21 59.16 -51 33.1
Dec. 4 22 06.06 -51 07.4 1.176 1.222 11.7
9 22 12.14 -50 45.3
14 22 17.80 -50 25.9 1.481 1.347 12.6
24 22 28.72 -49 53.0
Jan. 3 22 39.72 -49 26.5 2.016 1.607 14.1
13 22 51.07 -49 06.6
23 23 02.83 -48 53.8 2.444 1.869 15.2
Feb. 2 23 15.02 -48 48.8
12 23 27.61 -48 53.1 2.765 2.128 16.0
22 23 40.57 -49 07.8
Mar. 3 23 53.90 -49 34.1 2.986 2.381 16.6
m1 = 10.5 + 5 log Delta + 10 log r
Selected total visual magnitude estimates: Oct. 26.47, 5.9 (D.
Wallentine, Albuquerque, New Mexico, 7 x 35 binoculars); 27.19, 6.1
(A. Bernasconi, Saronno, Italy); 27.50, 5.5 (R. Keen, Boulder,
Colorado, 7 x 35 binoculars); 28.49, 5.9 (Wallentine); 28.54, 6.0 (M.
Mayo, Agoura, Calif., 10 x 50 binoculars); 29.51, 5.5 (Wallentine).
POSSIBLE COMET GEHRELS
Tom Gehrels, Lunar and Planetary Laboratory, communicates the
following positions of a possible comet discovered on exposures
with the 122-cm Schmidt telescope at Palomar. The object is nearly
stellar in appearance but seems to be slightly diffuse.
1975 UT R. A. (1950) Decl. m2
Oct. 27.146 1 51.6 +12 18 18
30.146 1 49.7 +12 07
OX-192
R. F. Willson, Department of Earth and Planetary Sciences,
Massachusetts Institute of Technology, reports that the optical counterpart
of the radio source OX-192 (R.A. = 21h55m23s.6, Decl. = -15o15'21"
equinox 1950.0) has varied in magnitude from ~ 19 to 12.5 since
1895, according to plates in the Harvard collection. A major outburst
occurred in 1899 when the magnitude changed from ~ 16 to 12.5
in less than a year. At least three other outbursts, in 1933, 1941
and 1948, had amplitudes of about three magnitudes.
NOVA AQUILAE 1975
J. Bortle, Brooks Observatory, writes that on Sept. 30.1 UT he
estimated the magnitude of this object to be 14.8.
1975 November 7 (2861) Brian G. Marsden
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