Central Bureau for Astronomical Telegrams
IAUC 3217: Cir X-1; HR 1099; P/SHAJN-SCHALDACH; 1978b
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Read IAUC 3218
Circular No. 3217
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 Telex: 921428
Telephone: (617) 864-5758
CIRCINUS X-1
I. S. Glass, South African Astronomical Observatory, reports
that on Mar. 29 and Apr. 3 Cir X-1 was two magnitudes fainter in
the infrared (JHK) than previously observed at the same phases.
HR 1099
R. S. McMillan, Marshall Space Flight Center, writes: "Optical
linear polarization measurements of HR 1099 were made on Feb. 24
with a two-channel, rotating wave-plate polarimeter on the 100-cm
reflector at the University of Arizona's Mount Lemmon Observatory.
The ninth-magnitude companion star was included in the focal-plane
diaphragm, and the data are corrected for some small sky background
and instrumental polarization. Averages of observations made during
2h04m-2h32m UT are given, the error estimates being standard
errors of the means of the individual observations: effective
wavelength 0.76 um, polarization 0.10 +/- 0.03 percent, p.a. 77o; 0.65 um,
0.02 +/- 0.05, 65o; 0.52 um, 0.04 +/- 0.04, 138o; 0.44 um, 0.05 +/- 0.04,
127o; 0.36 um, 0.04 +/- 0.12, 176o. The data are consistent with an
unpolarized source."
PERIODIC COMET SHAJN-SCHALDACH
The following ephemeris, by the undersigned, is from the
elements in Handb. Br. Astron. Assoc. for 1978:
For dT = +1d
1978/79 ET R. A. (1950) Decl. Delta r dR.A. dDecl. Mag.
June 21 22 44.61 - 4 10.1 2.147 2.642 -1.24 - 5.2 20.4
July 1 22 50.68 - 3 39.8 -1.34 - 5.7
11 22 54.94 - 3 22.9 1.860 2.573 -1.45 - 6.2 20.0
21 22 57.18 - 3 21.7 -1.57 - 6.8
31 22 57.27 - 3 38.1 1.623 2.508 -1.69 - 7.4 19.5
Aug. 10 22 55.18 - 4 12.8 -1.81 - 7.9
20 22 51.16 - 5 04.4 1.459 2.447 -1.90 - 8.2 19.2
30 22 45.74 - 6 09.2 -1.95 - 8.3
Sept. 9 22 39.72 - 7 20.7 1.389 2.392 -1.97 - 8.1 19.0
19 22 34.13 - 8 31.0 -1.94 - 7.8
29 22 29.92 - 9 32.5 1.419 2.344 -1.88 - 7.2 19.0
Oct. 9 22 27.87 -10 19.2 -1.80 - 6.7
19 22 28.44 -10 47.4 1.532 2.303 -1.70 - 6.2 19.0
29 22 31.76 -10 56.1 -1.60 - 5.8
Nov. 8 22 37.74 -10 45.2 1.702 2.269 -1.51 - 5.5 19.2
18 22 46.14 -10 16.1 -1.43 - 5.3
28 22 56.62 - 9 30.4 1.903 2.245 -1.36 - 5.2 19.4
Dec. 8 23 08.91 - 8 29.8 -1.30 - 5.1
18 23 22.67 - 7 16.3 2.119 2.229 -1.24 - 5.1 19.6
28 23 37.66 - 5 51.8 -1.20 - 5.1
Jan. 7 23 53.65 - 4 18.3 2.336 2.223 -1.16 - 5.1 19.8
17 0 10.47 - 2 37.6 -1.12 - 5.0
27 0 27.96 - 0 51.7 2.548 2.227 -1.09 - 5.0 20.0
Feb. 6 0 46.03 + 0 57.6 -1.06 - 4.9
16 1 04.57 + 2 48.4 2.748 2.241 -1.04 - 4.8 20.2
26 1 23.52 + 4 39.1 -1.02 - 4.6
Mar. 8 1 42.82 + 6 27.9 2.933 2.264 -1.00 - 4.4 20.4
PERIODIC COMET WILD 2 (1978b)
The following precise positions have been reported:
1978 UT R. A. (1950) Decl. m1 Observer
Feb. 26.48067 5 24 03.33 +21 23 07.7 11 Suzuki
Mar. 11.42726 5 38 02.96 +22 OS 31.5 11 Natori
11.43125 5 38 03.25 +22 OS 32.5 "
12.42292 5 39 22.89 +22 08 37.4 11 "
12.42813 5 39 23.36 +22 08 38.4 "
28.83243 6 06 09.83 +22 51 15.6 12.3 Mrkos
28.83799 6 06 10.49 +22 51 15.8 "
29.82050 6 08 02.68 +22 53 07.8 12.3 "
29.82501 6 08 03.11 +22 53 07.4 "
30.82469 6 09 59.01 +22 54 54.6 12.2 "
30.82909 6 09 59.50 +22 54 54.9 "
31.80550 6 11 54.37 +22 56 32.2 12.2 "
31.81001 6 11 54.90 +22 56 33.7 "
Apr. 1.80312 6 13 53.29 +22 58 06.7 12.4 "
1.80758 6 13 53.87 +22 58 06.9 "
4.49282 6 19 22.39 +23 01 46.2 12 Urata
4.50000 6 19 23.14 +23 01 48.5 "
6.80664 6 24 14.92 +23 04 06.1 12.2 Mrkos
6.81117 6 24 15.59 +23 04 07.4 "
7.44132 6 25 36.68 +23 04 40.6 12 Urata
7.44931 6 25 37.64 +23 04 42.6 "
7.80510 6 26 23.81 +23 04 54.2 12.0 Mrkos
7.80962 6 26 24.39 +23 04 54.5 "
8.82091 6 28 36.56 +23 OS 36.4 12.0 "
8.82543 6 28 37.13 +23 OS 36.1 "
9.80687 6 30 46.89 +23 06 06.2 12.0 "
9.81133 6 30 47.51 +23 06 06.7 "
K. Suzuki (JCPM Oi Station), A. Natori and T. Urata (JCPM Yakiimo
Station). From Nihondaira Obs. Circ. No. 970.
A. Mrkos (Klet Observatory). 62.5-cm Maksutov telescope.
1978 May 5 (3217) Brian G. Marsden
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