Central Bureau for Astronomical Telegrams
IAUC 2218: 1969g; N Ser 1970
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Read IAUC 2219
Circular No. 2218
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 TAGO-SATO-KOSAKA (1969g)
Further precise positions have been reported as follows:
1970 UT R. A. (1950) Decl. Observer
Jan. 30.81097 1 47 50.98 +16 48 19.9 Reipurth
Feb. 9.82667 2 38 30.11 +32 44 41.3 Milet
9.83048 2 38 30.96 +32 44 52.2 "
10.77198 2 42 16.87 +33 40 59.2 "
11.74245 2 46 02.06 +34 34 55.2 Reipurth
11.75229 2 46 04.27 +34 35 27.4 "
11.75466 2 46 04.74 +34 35 34.4 "
12.74663 2 49 47.23 +35 26 54.0 "
13.82256 2 53 40.75 +36 18 40.5 "
13.83174 2 53 42.84 +36 19 07.2 "
15.81554 3 00 35.02 +37 45 10.2 "
15.83052 3 00 38.00 +37 45 45.8 "
15.83590 3 00 38.94 +37 45 58.0 "
16.77638 3 03 46.40 +38 23 00.8 Milet
18.73600 3 10 03.35 +39 33 34.0 Reipurth
18.73912 3 10 03.83 +39 33 40.9 "
18.74226 3 10 04.35 +39 33 44.6 "
18.74538 3 10 05.26 +39 33 53.4 "
B. Reipurth and B. G. Jorgensen (Copenhagen University Observatory).
25-cm photographic refractor.
B. Milet (Nice Observatory). Zeiss double astrograph.
The following improved elements, by B. G. Marsden are from
167 observations October 13 to February 18, with perturbations by
all nine planets taken into account. Mean residual 1".21.
Epoch = 1969 Dec. 5.0 ET
T = 1969 Dec. 21.26769 ET Peri. = 267.82741
e = 0.9999156 Node = 100.96284 1950.0
q = 0.4726381 AU Incl. = 75.81975
1970 ET R. A. (1950) Decl. Delta r m2
Mar. 15 4 13.19 +47 27.1 1.668 1.754 9.6
25 4 35.58 +49 01.9
Apr. 4 4 57.16 +50 11.4 2.211 2.059 10.9
14 5 18.27 +51 04.0
24 5 39.04 +51 44.4 2.719 2.350 11.9
May 4 5 59.54 +52 15.7
14 6 19.80 +52 39.9 3.181 2.627 12.7
24 6 39.80 +52 58.5
June 3 6 59.51 +53 12.8 3.587 2.894 13.4
13 7 18.92 +53 23.9
23 7 37.98 +53 32.8 3.930 3.151 14.0
July 3 7 56.67 +53 40.6
13 8 14.98 +53 48.2 4.205 3.400 14.4
23 8 32.86 +53 56.9
Aug. 2 8 50.31 +54 07.6 4.411 3.641 14.8
12 9 07.30 +54 21.5
22 9 23.81 +54 39.9 4.550 3.876 15.2
Sept. 1 9 39.83 +55 03.8
11 9 55.31 +55 34.6 4.629 4.104 15.5
21 10 10.21 +56 13.5
Oct. 1 10 24.49 +57 01.5 4.660 4.327 15.7
11 10 38.06 +57 59.7
21 10 50.82 +59 08.8 4.659 4.546 15.9
31 11 02.62 +50 29.3
Nov. 10 11 13.26 +62 01.3 4.649 4.760 16.1
20 11 22.48 +63 43.9
30 11 29.90 +65 36.0 4.658 4.969 16.3
The following integrated magnitude estimates, by J. E. Bortle
(B), Mount Vernon, New York, and by M. Sugano (S), Akashi, Japan,
have been made using 7 x 50 binoculars:
1970 UT Mag. 1970 UT Mag. 1970 UT Mag.
Jan. 17.40 4.2 S Jan. 31.52 5.7 S Feb. 8.0 5.5 B
19.40 4.4 S Feb. 1.48 5.9 S 9.54 5.4 S
20.41 4.5 S 2.0 5.3 B 11.49 5.7 S
21.45 4.5 S 3.48 6.2 S 13.0 5.9 B
27.41 5.0 S 4.53 6.0 S 14.0 6.0 B
28.46 4.9 S 5.0 6.1 B 18.0 7.0 B
29.44 5.0 S 5.43 6.1) S 21.0 7.5 B
31.0 5.2 B 6.46 5.6 S
NOVA SERPENTIS 1970
P. Grosbol and B. G. Jorgensen, Copenhagen University Observatory,
send a position for the nova, obtained from a plate taken
with the 50/77/150 cm Schmidt telescope at Brorfelde. It differs
from that given on IAUC 2216 by -0s.07, +0".6. They identify the
prenova as a star of magnitude 17 +/- 1. This star is one of the
five mentioned on IAUC 2216, and the Tokyo astronomers derive from
the Palomar Sky Survey prints blue and red magnitudes of 15.8 and
15.4, respectively.
1970 February 27 (2218) Brian G. Marsden
Read IAUC 2219
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