Central Bureau for Astronomical Telegrams
IAUC 3082: N Sgr 1977; NQ Vul; N Sge 1977; N IN LMC; 1975o; P/SCHWASSMANN-WACHMANN 1
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Read IAUC 3083
Circular No. 3082
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
NOVA SAGITTARII 1977
B. F. Hatfield and D. Brodzik, O'Brien Observatory, University
of Minnesota, provide the following infrared observations: May 21.3
UT, 4.9 at 3.6 um; June 9.3,6.5 at 2.2 um, 4.4 at 3.6 um, 3.5 at 4.8
um. The infrared excess at 3.6 and 4.8 um (deteriorating weather
prevented measurements at longer wavelengths) indicates that the nova
has apparently condensed a dust shell of temperature 900 +/- 100 K.
Dust formation evidently began before May 21.
The following recent visual magnitude estimates have been reported:
May 12.34 UT, 10.4 (J. Bortle, Brooks Observatory); 23.27,
10.9 (Bortle); 31.42, 11.5 (P. L. Collins, Steward Observatory).
NQ VULPECULAE
B. Carney, Center for Astrophysics, provides the following
photoelectric data (probably accurate to 0.02 magnitude or better),
obtained at Kitt Peak: May 6.431 UT, V = 11.79, B-V = +0.61; 7.406,
V = 11.73, B-V = +0.63.
Recent visual magnitude estimates: May 13.30 UT, 11.9 (Bortle);
26.27, 11.2 (S. O'Meara, Harvard Obs.); June 9.14, 11.4 (O'Meara).
Corrigendum. On IAUC 3073, the Apr. 18.36 observations of NQ
Vul and Nova Sge 1977 (by Bortle) were accidentally interchanged.
NOVA SAGITTAE 1977
Visual magnitude estimates: May 14.34 UT, 12.1 (Bortle); 23.12,
11.7 (Bortle); 31.44, 11.5 (Collins); June 9.14, 12.0 (O'Meara).
NOVA IN LARGE MAGELLANIC CLOUD
A. M. van Genderen, Leiden Observatory, provides the following
photoelectric observations (obtained with the 90-cm light collector
at the Southern Station) of the second recent LMC nova (IAUC 3049):
1977 UT V B-V 1977 UT V B-V
Mar. 18.767 11.36 +0.22 Apr. 15.729 14.59 -0.15
19.747 11.58 +0.17 17.735 14.70 -0.22
21.774 11.99 +0.09 19.735 14.81 -0.21
22.747 12.26 +0.04 25.726 15.08 -0.16
23.799 12.49 +0.03 29.740 15.10 -0.11
25.778 12.81 +0.06 May 7.722 15.17 -0.19
28.771 13.06 -0.01 12.726 15.22 -0.12
29.764 13.22 +0.06 16.719 15.41 -0.22
Apr. 8.729 13.98 -0.05 19.722 15.56 -0.17
14.717 14.36 -0.07 23.703 15.69 -0.17
PERIODIC COMET GEHRELS 3 (1975o)
The following precise positions were obtained by G. Schwartz
and R. E. McCrosky with the 155-cm reflector at Harvard College
Observatory's Agassiz Station. Measurer: J. H. Bulger.
1977 UT R. A. (1950) Decl. Observer
Jan. 13.18484 6 06 32.69 +22 34 26.1 Schwartz
Feb. 16.05826 5 55 04.48 +22 34 01.4 McCrosky
Mar. 22.05812 6 07 33.91 +22 36 05.1 Schwartz
PERIODIC COMET SCHWASSMANN-WACHMANN 1
The following ephemeris, by P. Herget, is from Publ. Cincinnati
Obs. (1968) No. 23:
1977/78 ET R. A. (1950) Decl. Delta r
Aug. 5 5 08.70 +30 30.8 6.408 5.862
15 5 15.35 +30 44.7 6.280 5.867
25 5 21.20 +30 57.9 6.142 5.871
Sept. 4 5 26.17 +31 10.6 5.995 5.876
14 5 30.12 +31 22.8 5.844 5.880
24 5 32.92 +31 34.5 5.691 5.885
Oct. 4 5 34.47 +31 45.6 5.541 5.889
14 5 34.72 +31 55.7 5.398 5.893
24 5 33.60 +32 04.2 5.268 5.898
Nov. 3 5 31.18 +32 10.6 5.153 5.902
13 5 27.57 +32 14.0 5.060 5.907
23 5 22.97 +32 13.6 4.993 5.911
Dec. 3 5 17.67 +32 08.9 4.954 5.915
13 5 12.03 +31 59.8 4.945 5.920
23 5 06.50 +31 46.5 4.968 5.924
Jan. 2 5 01.43 +31 29.9 5.022 5.928
12 4 57.20 +31 11.1 5.104 5.933
22 4 54.03 +30 51.5 5.212 5.937
Feb. 1 4 52.13 +30 32.1 5.340 5.941
11 4 51.55 +30 14.1 5.484 5.946
21 4 52.28 +29 58.0 5.640 5.950
Mar. 3 4 54.32 +29 44.2 5.803 5.954
13 4 57.53 +29 32.8 5.967 5.958
23 5 01.82 +29 23.5 6.129 5.963
Apr. 2 5 07.08 +29 16.1 6.285 5.967
12 5 13.17 +29 10.2 6.432 5.971
1977 June 16 (3082) Brian G. Marsden
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