Central Bureau for Astronomical Telegrams
IAUC 2818: 1975h; 1974f
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Read IAUC 2819
Circular No. 2818
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 KOBAYASHI-BERGER-MILON (1975h)
C. Lillie and G. Emerson, Laboratory for Atmospheric and Space
Physics, University of Colorado, report that observations during
July 19-Aug. 5 using the 61-cm reflector at Mount Evans Observatory
and a scanning spectrometer (covering the range 3000-5800 A) show
strong emission from the OH (0,0) band at 3090 A. When the results
are rectified, this band was found to be four times as intense as
the CN (0,0) 3883 A band on July 27 and twice as intense as CN on
Aug. 5. On the latter date the CN band was four times as intense
as NH (0,0) 3360 A, which was in turn 20 times as intense as OH
(1,1) 3140 A. The C3 group at 4050 A, CN (0,1) 4216 A, CH (0,0) 4300 A,
the C2 Swan bands at 4380, 4737 and 5165 A, and possibly [O I]
5577 A, were also observed. The weak continuum reached its peak
near 4000 A but could be detected down to 3300 A.
P. A. Wehinger and S. Wyckoff, Wise Observatory, write:
"Strongly exposed image-tube spectra (dispersions 150 and 240 A/mm)
covering the range 3000-9000 A were obtained on Aug. 8.7 and 9.7 UT
(r ~ 0.8 AU, Delta ~ 0.6 AU) using the 100-cm reflector. Superimposed
on a very weak solar continuum are very strong emission bands of C2
(Delta-v = +1, 0 and -1 Swan sequences) and CN (3883 A) that extend
symmetrically on either side of the nucleus for more than 3 x 10**5 km.
Also present were strong emission bands of CN (3590, 4216 A), C3
(4050 A), C2 (Delta-v = +2 and -2 Swan sequences) and NH (3360 A); while
emission bands of OH (3090, 3138 A), CH (4315 A), NH2 (12,0 through
5,0) and CN (red system: 2,0 and 3,1) were present with moderate
strength. Lines of the H2O+ 8,0 (6158, 6199, 6210 A) and 6,0
(6987, 7040, 7054 A) sub-bands were weakly present and were the
only tail features observed."
Further precise positions have been reported as follows:
1975 UT R. A. (1950) Decl. m1 Observer
July 13.57118 20 57 23.01 +14 29 07.5 Suzuki
14.58646 20 48 28.08 +17 57 59.8 "
14.62257 20 48 07.20 +18 05 46.2 "
15.61007 20 38 05.01 +21 47 28.6 "
17.70104 20 11 18.52 +30 28 19.9 "
18.71285 19 54 57.65 +34 56 52.3 Taguchi
18.72873 19 54 41.11 +35 01 03.8 "
26.57361 16 10 49.90 +58 35 36.9 5 Urata
26.57685 16 10 43.47 +58 35 44.0 "
27.93087 15 27 38.38 +58 52 20.6 4.5 Aarnio
29.13438 14 53 57.52 +58 27 37.4 Bojanowski
29.22257 14 51 40.64 +58 24 43.8 Giclas
29.24618 14 51 04.03 +58 23 55.4 "
30.53958 14 20 41.76 +57 29 00.4 Kasahara
30.54236 14 20 38.33 +57 28 53.6 "
30.54514 14 20 35.48 +57 28 44.4 Odagiri
30.54792 14 20 31.50 +57 28 36.2 "
31.22882 14 06 40.00 +56 53 09.6 Giclas
Aug. 2.09514 13 35 01.40 +55 05 12.6 Bojanowski
4.51748 13 04 33.71 +52 40 19.4 5 Urata
4.52237 13 04 30.51 +52 40 01.0 "
6.17378 12 48 34.70 +51 05 51.9 Giclas
K. Suzuki (JCPM Oi) and T. Urata (Nihondaira Observatory). Measurer:
Urata. From Nihondaira Obs. Circ. No. 677.
T. Taguchi (JCPM Sapporo). Measurer: M. Takeishi. Long. = -141o22'52",
Lat. = +43o05'25", h = 10 m. From Nihondaira Obs. Circ. No. 677.
J. J. Aarnio and R. L. Waterfield (Woolston Observatory). Measurer:
Waterfield. A plate by G. H. Rutter on Aug. 4.0 shows a 7o tail
in p.a. 86o; one on Aug. 10.0 shows an 11o tail in p.a. 70o.
Jo-Ann Bojanowski and P. Collins (Harvard College Observatory).
41-cm Metcalf astrograph. Measurer: Bojanowski
H. L. Giclas (Lowell Observatory). 33-cm photographic telescope.
Measurer: Mary Lou Kantz. A 30-min exposure on Aug. 6.2 shows a
tail > 6o long in p.a. 76o.
S. Kasahara and S. Odagiri (Sendai Astronomical Observatory). From
Nihondaira Obs. Circ. No. 677.
Further selected total visual magnitude estimates, coma diameters
and tail information: Aug. 4.87, 5.0, -, - (M. Antal, Skalnate
Pleso Observatory, 25 x 100 binoculars); 6.05, 5.0, -, - (K.
Simmons, Switzerland, Florida, 7 x 50 binoculars); 7.27, 4.2, 6', 4o
in p.a. 75o (J. Mikolas, Chico, California, 10 x 50 binoculars);
8.11, 4.2, 17', 105' in 70o (C. Sherrod, North Little Rock, Arkansas,
7 x 50 binoculars); 9.12, 4.5, 18', 90' in 65o (Sherrod);
10.08, 4.6, -, - (P. Collins, Harvard Observatory, 7 x 50 binoculars);
11.06, 5.1, -, - (Simmons); 12.21, 4.0, 10', > 7o (M. J.
Mayo, Lockwood Valley, California, 7 x 35 binoculars); 15.12, 4.9,
10', > 2o.5 in 55o (P. Maley, Houston, Texas, 7 x 35 binoculars);
17.11, 4.9, 10', > 1o in 50o (Maley); 18.11, 4.9, 10', - (Maley).
PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1974f)
C. Torres, University of Chile, provides the following precise
position, obtained with the Maksutov astrograph at the Cerro El
Roble Station:
1974 UT R. A. (1950) Decl.
Dec. 13.04676 20 03 47.93 -14 37 33.9
1975 August 19 (2818) Brian G. Marsden
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