Central Bureau for Astronomical Telegrams
IAUC 1926: 1965f; 1965h; 1965i
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 1927
Circular No. 1926
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 IKEYA-SEKI (1965f)
The folllowing precise positions have been reported:
1965 UT R.A. (1950) Decl. Observer
Sept.21.37818 8 55 08.53 - 9 14 41.1 P
21.38061 8 55 09.29 - 9 14 44.0 P
21.38443 8 55 10.11 - 9 14 46.3 P
22.34554 8 59 06.01 - 9 28 31.6 P
22.35249 8 59 07.68 - 9 28 46.5 P
29.50586 9 34 07.34 -11 23 36.9 VB
Oct. 1.13785 9 43 54.36 -11 52 04.9 A
2.14028 9 50 20.42 -12 09 51.4 A
P. Pereyra - Cordoba Observatory.
VB. Van Biesbroeck - Steward Observatory, Tucson. Total mag. 6
A Antal - Skalnate Pleso Observatory. Total mag. 6; tail < 1o.
Orbital elements have been received as follows:
L. E. Cunningham M. McCants
T = 1965 October 21.170 1965 October 21.198
Peri. = 69.00 67.04
Node = 346.44 1950.0 342.79 1950.0
Incl. = 141.87 141.36
q = 0.0079 AU 0.00603 AU
Ephemerides from these sets of elements are in close agreement with
the one on IAUC 1925.
COMET ALCOCK (1965h)
The following precise position has been received from
G. Van Biesbroeck, University of Arizona:
1965 UT R.A. (1950) Decl. Mag.
Sept.29.10583 17 02 31.97 +33 27 41.0 11
Dr. Z. Sekanina, People's Observatory, Prague, has sent the
following elements and ephemeris for Comet Alcock, based on three
accurate positions and an arc of three days. The residuals are
less than 1".
T = 1965 Oct. 26.036
Peri. = 150.27
Node = 174.71 1950.0
Incl. = 65.12
q = 1.2981 AU
1965 ET R. A. (1950) Decl. Delta r
Oct. 2 17 14.1 +31 18 1.187 1.348
7 17 34.4 +27 15 1.150 1.329
12 17 55.1 +22 50 1.123 1.315
17 18 16.1 +18 06 1.106 1.305
22 18 37.3 +13 12 1.101 1.300
27 18 58.4 + 8 14 1.108 1.298
Nov. 1 19 19.2 + 3 23 1.128 1.301
6 19 39.7 - 1 14 1.159 1.309
PERIODIC COMET TEMPEL-TUTTLE (1965i)
Dr. J. Schubart, Astronomisches Rechen-Institut, writes that
he has found diffuse trails, probably images of Comet Tempel-Tuttle,
on plates taken by M. J. Bester with the 10-inch Metcalf astrograph
at Boyden Observatory, Bloemfontein. The positions have been
measured by Drs. E. Geyer and Schubart as follows:
1965 UT R.A. (1950) Decl. Mag.
June 30.13711 2 37 47.9 + 1 28 07 16
July 1.12918 2 36 44.9 + 1 00 39
The second observation is uncertain, as the emulsion is disturbed
in that region of the plate. Both positions agree very well with
an orbit close to the predicted one (IAUC 1907), applying a correction
of Delta-T = +5.0d. Since the comet has a retrograde orbit, confusion
with a minor planet is unlikely. For the re-examination of
other plates, use may be made of the published ephemerides corrected
by 5/6 of the absolute value of the variation in both coordinates.
1965 October 4 (1926) Owen Gingerich
Read IAUC 1927
Our Web policy. Index to the CBAT/MPC/ICQ pages.
