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IAUC 5939: N Cas 1993; 1993 FW

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                                                  Circular No. 5939
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 CASSIOPEIAE 1993
     S. Boyle, University of London Observatory, reports: "Nova Cas
1993 was observed with the cassegrain spectrograph on the 0.6-m Allen
reflector at Mill Hill during January and February.  The most recent
spectrum (range 505-675 nm, resolution 1.0 nm), obtained on Feb. 20.82
UT, suggests that the nova is entering (or has entered) its nebular
phase.  The iron lines seen in earlier spectra were not detected.
Emission lines at 557.7 nm, 630.0 nm and 636.4 nm ([O I] forbidden
lines) were detected.  These lines were observed to be narrower, and
stronger relative to H-alpha, than in a spectrum obtained on Feb. 7.
The 'main' emission-line due to H-alpha also narrowed between Feb. 7
and 20.  A further emission line, with intensity 0.3 of the main
H-alpha emission line, appears at 659.9 nm in the Feb. 20 spectrum.
If this line also arises from H-alpha, it represents a doppler
velocity of about 1700 km/s."
     Further visual magnitude estimates: Feb. 18.21 UT, 10.8 (O.
Midtskogen, Tranby, Norway); 18.75, 11.2 (B. H. Granslo, Fjellhamar,
Norway); 19.22, 11.4 (P. Schmeer, Bischmisheim, Germany); 19.88, 11.6
(G. Comello, Groningen, Netherlands); 20.06, 12.1 (Granslo); 20.80,
12.3 (G. Poyner, Birmingham, England); 21.10, 12.7 (R. King, Duluth,
MN); 22.13, [13.3 (R. Royer, Lakewood, CA); 22.42, 12.7 (P. Dombrowski,
Glastonbury, CT); 22.76, 13.9 (Midtskogen); 22.86, 13.5 (S. Meister,
Bulach, Switzerland).


1993 FW
     Continuation to the ephemeris on IAUC 5856, from the orbital
elements on MPEC 1994-D09:

1994 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      V
Feb. 17    12 35.03    - 3 40.4   41.393   42.141  138.7    0.9     23.4
     27    12 34.47    - 3 36.4   41.289   42.140  148.9    0.7     23.3
Mar.  9    12 33.82    - 3 32.0   41.211   42.140  159.1    0.5     23.3
     19    12 33.12    - 3 27.1   41.162   42.140  169.3    0.3     23.3
     29    12 32.39    - 3 22.1   41.142   42.140  179.4    0.0     23.2
Apr.  8    12 31.66    - 3 17.0   41.152   42.140  170.6    0.2     23.3
     18    12 30.95    - 3 12.2   41.192   42.140  160.6    0.5     23.3
     28    12 30.29    - 3 07.6   41.259   42.140  150.6    0.7     23.3
May   8    12 29.71    - 3 03.6   41.353   42.139  140.8    0.9     23.3
     18    12 29.22    - 3 00.2   41.469   42.139  131.0    1.0     23.4
     28    12 28.85    - 2 57.5   41.604   42.139  121.3    1.2     23.4
June  7    12 28.60    - 2 55.6   41.755   42.139  111.6    1.3     23.4


1994 February 23               (5939)              Brian G. Marsden

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