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IAUC 7079: N Mus 1998; C/1998 U5

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                                                 Circular No. 7079
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


NOVA MUSCAE 1998
     W. Liller, Vina del Mar, Chile, reports the following position
for the star reported on IAUC 7078, measured from a CCD frame taken
with a 0.20-m f/1.5 Schmidt camera:  R.A. = 11h56m08s.9, Decl. =
-65o34'20".6 (equinox 2000.0; standard deviations 0s.2 and 0".4).
An objective-prism spectrum taken with the same instrument shows
H-alpha to be exceptionally bright (about 7.3 times brighter than
the neighboring continuum); H-beta is weakly present.  On Dec.
1.1754 UT, V = 9.55.
     B. M. Ewen-Smith, Nuriootpa, South Australia, reports the
following visual magnitude estimate:  Dec. 31.495 UT, 9.9.


COMET C/1998 U5 (LINEAR)
     Ephemeris extension to IAUC 7059 (elements MPC 33189):

1998/99     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Dec. 13    21 26.73   +25 22.1   1.013   1.244   77.0   50.5    9.0
     23    21 16.09   +20 27.3   1.292   1.236   64.1   45.7    9.5
Jan.  2    21 11.11   +17 33.8   1.551   1.248   53.5   39.3    9.9
     12    21 08.70   +15 45.6   1.781   1.278   44.3   32.5   10.3
     22    21 07.60   +14 37.5   1.974   1.324   36.8   26.4   10.7
Feb.  1    21 07.10   +13 56.8   2.129   1.385   31.3   21.7   11.1
     11    21 06.74   +13 36.3   2.243   1.458   28.8   19.0   11.4
     21    21 06.15   +13 31.9   2.318   1.541   29.8   18.6   11.7
Mar.  3    21 04.93   +13 40.7   2.355   1.630   34.0   19.9   12.0
     13    21 02.66   +14 00.3   2.357   1.726   40.5   22.0   12.2
     23    20 58.89   +14 28.9   2.327   1.826   48.5   24.1   12.4
Apr.  2    20 53.04   +15 04.1   2.271   1.928   57.5   25.9   12.6
     12    20 44.48   +15 42.9   2.194   2.033   67.5   27.1   12.8
     22    20 32.47   +16 21.0   2.103   2.140   78.3   27.4   12.9
May   2    20 16.24   +16 51.8   2.009   2.247   90.0   26.6   13.0
     12    19 55.24   +17 06.0   1.922   2.355  102.4   24.8   13.1

     Total visual magnitude and coma-diameter estimates: Nov. 26.42
UT, 8.4, 10' (N. Biver, Hale-Pohaku, HI, 7x50 binoculars); Dec.
6.84, 9.1, 5' (A. Pereira, Cabo da Roca, Portugal, 14x100
binoculars); 14.12, 8.8, 8' (R. Keen, Mt. Thorodin, CO, 0.15-m
reflector); 18.72, 9.6, 6' (M. Meyer, Frauenstein, Germany, 20x100
binoculars); 24.73, 9.1, 3' (A. Diepvens, Balen, Belgium, 0.15-m
refractor); 30.70, 10.8, 4'.0 (M. Lehky, Hradec Kralove, Czech
Republic, 25x100 binoculars).

                      (C) Copyright 1998 CBAT
1998 December 31               (7079)            Daniel W. E. Green

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