Central Bureau for Astronomical Telegrams
IAUC 5550: N Cyg 1992; N Sco 1992; 1992 KD
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 5551
Circular No. 5550
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
NOVA CYGNI 1992
J. Krautter, Landessternwarte Heidelberg; H. Ogelman, University
of Wisconsin; and S. Starrfield, Arizona State University,
communicate: "We report the detection of Nova Cyg 1992 in soft x-
rays with the ROSAT satellite on Apr. 22, 60 days after visual
maximum; the exposure time was 2560 s. The count rate in the ROSAT
PSPC band was 0.02 +/- 0.003 counts/s. All the detected photons
were above 0.7 keV, indicating a hard spectrum. The observed flux
at the satellite in the 1- to 2-keV band corresponds to 2 x 10E-13
erg/s."
Further visual magnitude estimates (cf. IAUC 5544): June
13.97 UT, 8.5 (B. H. Granslo, Fjellhamar, Norway); 15.22, 7.8 (R.
Donner, Isla Vista, CA); 19.95, 8.5 (J. Ripero, Madrid, Spain);
20.90, 8.5 (A. Boattini, Florence, Italy); 21.23, 8.7 (W. G.
Dillon, Missouri City, TX); 21.91, 8.8 (M. Tombelli, Piazzano,
Italy).
NOVA SCORPII 1992
W. H. Allen, Carter Observatory, reports that Nova Sco 1992
has again brightened, as indicated by the following photometry
obtained at the Adams Lane Observatory (cf. IAUC 5542, 5546): June
16.45 UT, V = 8.79, B-V = +0.76, U-B = -0.19; 24.35, 8.16, +1.02,
-0.11; 25.37, 8.05, +1.04, -0.03.
W. Liller, Vina del Mar, Chile, provides the following
additional unfiltered CCD magnitudes (comparison star SAO 227635; cf.
IAUC 5546): June 15.20 UT, 7.66; 17.02, 7.97; 21.14, 8.12 (through
clouds); 23.01, 8.12.
1992 KD
Ephemeris extension from orbital elements on MPC 20346:
1992 TT R. A. (2000) Decl. Delta r Elong. Phase V
June 17 15 14.63 + 5 08.8 0.428 1.348 133.9 32.9 16.2
27 15 29.85 +11 14.5 0.504 1.369 125.0 37.5 16.7
July 7 15 45.54 +14 45.8 0.589 1.396 118.3 39.9 17.2
17 16 01.83 +16 32.5 0.681 1.429 113.2 40.8 17.5
27 16 18.71 +17 09.2 0.776 1.466 109.1 40.9 17.9
Aug. 6 16 36.26 +16 59.4 0.874 1.507 105.7 40.4 18.2
16 16 54.50 +16 19.6 0.976 1.552 102.6 39.5 18.5
26 17 13.37 +15 21.3 1.080 1.600 99.8 38.5 18.7
Sept. 5 17 32.86 +14 13.1 1.187 1.649 97.1 37.3 19.0
15 17 52.89 +13 02.0 1.298 1.701 94.3 36.1 19.2
1992 June 26 (5550) Daniel W. E. Green
Read IAUC 5551
Our Web policy. Index to the CBAT/MPC/ICQ pages.
