Central Bureau for Astronomical Telegrams
IAUC 2220: N Ser 1970; RAPIDLY MOVING ASTEROID; 1969c
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Read IAUC 2221
Circular No. 2220
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
NOVA SERPENTIS 1970
M. S. Burkhead, M. A. Seeds [we apologize for giving this name
incorrectly on IAUC 2215] and V. J. Lee, Goethe Link Observatory,
Indiana University, have also identified the prenova as the object
reported on IAUC 2218. From the Palomar Sky Survey charts they
derive the approximate magnitude and color as V = 16.1, B - V = +0.8.
They also provide the following additional UBV measures and remark
that over 15-minute intervals the nova appears constant with no
short term variability.
1970 UT V B - V U - B Remarks
Feb. 18.46 4.41 +1.12 +0.74 Replaces earlier result
20.44 4.61 +0.99 +0.54 74 Oph standard only
21.44 4.62 +0.97 +0.46
22.44 4.69 +0.88 +0.35
24.44 4.63 +0.87 +0.29 74 Oph only; clouds
26.44 4.77 +0.87 +0.19
J. Grygar and J. B. Hutchings, Dominion Astrophysical Observatory,
Victoria, write: "Eleven plates were taken between February
20 and 22 at dispersions between 6.5 and 15 A/mm, covering the
range 3500-6600 A, with the 122-cm and 183-cm telescopes of the
Dominion Astrophysical Observatory. No change was obvious in the
spectrum during this time interval. Lines of H I, Fe II, Cr II,
Ti II, Na I and Ca II were definitely identified, and interstellar
components of Ca II (H, K) and Na I (D1, D2) were clearly visible.
Strong broad emission components were present in the Balmer, Fe II
and Ti II lines, and weaker emission in the Ca II and Na I lines.
No sharp emission peaks were present. The H-beta emission profile had
the appearance of two profiles superimposed, of widths about 1000
km/s and 1800 km/s. Other unblended emission profiles had a mean
width of 1800 km/s, apart from H-alpha which was about 2700 km/s in
width. There were two main absorption systems with mean displacements
of -600 km/s and -1050 km/s from the line standard wavelengths.
The higher velocity component was more prominent in the
Balmer lines, and slightly more prominent in the Fe II lines. The
components were about equal in strength in Na I, Ti II and Cr II,
and the low velocity component stronger in the Ca II lines."
RAPIDLY MOVING ASTEROID
Dr. M. Schmidt, California Institute of Technology, communicates
the following observations of a rapidly moving minor planet
discovered by C. Kowal at Palomar:
1970 UT R. A. (1950) Decl. Mag.
Jan. 31.268 8 02.7 +19 48 17
Feb. 1.341 8 00.9 +19 33 17
PERIODIC COMET WHIPPLE (1969c)
The following ephemeris extends that on IAUC 2144.
1970/71 ET R. A. (1950) Decl. Delta r Mag.
Apr. 4 22 34.90 - 3 13.6 3.511 2.749 19.6
14 22 50.77 - 1 46.9
24 23 06.42 - 0 19.4 3.303 2.699 19.4
May 4 23 21.81 + 1 07.7
14 23 36.88 + 2 33.3 3.066 2.653 19.2
24 23 51.57 + 3 56.1
June 3 0 05.82 + 5 14.8 2.810 2.612 18.9
13 0 19.52 + 6 28.0
23 0 32.55 + 7 34.3 2.542 2.575 18.6
July 3 0 44.77 + 8 32.1
13 0 55.97 + 9 19.6 2.272 2.544 18.3
23 1 05.94 + 9 55.1
Aug. 2 1 14.42 +10 16.6 2.013 2.518 18.0
12 1 21.12 +10 22.1
22 1 25.79 +10 10.0 1.782 2.499 17.7
Sept. 1 1 28.20 + 9 38.9
11 1 28.24 + 8 48.4 1.601 2.486 17.5
21 1 26.06 + 7 40.5
Oct. 1 1 22.01 + 6 18.8 1.498 2.480 17.3
11 1 16.81 + 4 50.2
21 1 11.37 + 3 23.5 1.494 2.481 17.3
31 1 06.61 + 2 06.9
Nov. 10 1 03.37 + 1 07.5 1.594 2.488 17.5
20 1 02.18 + 0 29.0
30 1 03.27 + 0 12.5 1.778 2.502 17.7
Dec. 10 1 06.69 + 0 16.7
20 1 12.27 + 0 39.2 2.019 2.522 18.0
30 1 19.80 + 1 16.9
Jan. 9 1 29.04 + 2 07.0 2.291 2.548 18.4
19 1 39.73 + 3 06.3
29 1 51.65 + 4 12.3 2.574 2.581 18.7
Feb. 8 2 04.64 + 5 22.7
18 2 18.50 + 6 35.3 2.853 2.618 19.0
28 2 33.11 + 7 48.3
Mar. 10 2 48.36 + 9 00.0 3.116 2.660 19.2
20 3 04.13 +10 09.0
30 3 20.33 +11 14.0 3.354 2.707 19.5
1970 March 5 (2220) Brian G. Marsden
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