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IAUC 4649: VY Aqr; 1987g; 1988j

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                                                  Circular No. 4649
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


VY AQUARII
     This dwarf nova is again in outburst, as indicated by the
following visual magnitude estimates:  Aug. 30.5 UT, [15 (A. Pearce,
Woodlands, W. Australia); 30.82, [12.5 (J. Isles, Limassol, Cyprus);
31.573, 13.3 (Pearce); 31.595, 12.9 (Pearce); 31.619, 12.5 (Pearce);
31.76, 11.0 (Isles); 31.853, 11.0 (P. Schmeer, Bischmisheim, W.
Germany); 31.92, 11.0 (M. Verdenet, Bourbon-Lancy, France); Sept.
1.04, 10.5 (G. Dyck, N. Dartmouth, MA); 1.05, 10.4 (W. Morrison,
Cavan, ON); 1.569, 10.2 (Pearce).  J. Mattei, AAVSO, notes that VY
Aqr is probably undergoing a supermaximum outburst and recommends
high-speed multi-wavelength photometry.


PERIODIC COMET TEMPEL 2 (1987g)
     D. K. Lynch and R. W. Russell, Space Science Laboratory,
The Aerospace Corporation, report the following infrared magnitudes
obtained at the Infrared Telescope Facility with a 7".8 aperture
and 60" chopper throw:  Aug. 18.29 UT, L = 10.51 +/- 0.11, M =
3-sigma upper limit of 8.08, N = 3.32 +/- 0.09; Aug. 19.30, L =
11.00 +/- 0.27, M = 8.04 +/- 0.15, N = 3.15 +/- 0.07.
     Total visual magnitude estimates (cf. IAUC 4628):  July 16.11
UT, 12.1 (J. E. Bortle, Stormville, NY, 0.50-m reflector); 19.23,
10.8 (C. S. Morris, Whitaker Peak, CA, 0.26-m reflector); Aug. 9.25,
9.4 (Morris, 20x80 binoculars); 10.85, 9.5 (A. Boattini, Montecarmo,
Italy, 0.33-m reflector); 12.05, 8.5 (V. F. de Assis Neto, Sao
Francisco de Oliveira, Brazil, 10x70 binoculars); 13.19, 8.3
(Morris, Pine Mountain Club, CA, 20x80 binoculars); 14.16, 8.4 (R.
Keen, Mt. Thorodin, CO, 8x40 binoculars); 16.13, 8.8 (E. A. Jacobson,
Evansville, MN, 10x50 binoculars); 18.18, 8.3 (Morris, Whitaker Peak,
CA); 20.15, 8.3 (Jacobson).


COMET MACHHOLZ (1988j)
     Total visual magnitude estimates:  Aug. 16.73 UT, 7.6 (D. A. J.
Seargent, The Entrance, N.S.W., 15x80 binoculars); 18.10, 7.9
(Boattini, 20x80 binoculars); 19.31, 7.6 (de Assis Neto); 20.36, 7.0
(Bortle, 20x80 binoculars); 20.8, 7.7 (R. H. McNaught, Coonabarabran,
N.S.W., 9x63 binoculars); 21.49, 7.4 (Morris, Pine Mountain Club, CA,
20x80 binoculars); 22.36, 7.0 (Bortle); 24.46, 7.7 (A. Hale, Las
Cruces, NM, 10x50 binoculars); 25.13, 6.9 (J. Campos, Durban, R.S.A.,
0.13-m refractor; faint 1.5-deg tail in p.a. about 152); 25.79, 6.4
(T. Lovejoy, Shailer Park, Queensland, 15x80 binoculars; 0.7-deg
tail); 28.78, 6.1 (Lovejoy; 0.3-deg tail; bright moonlight).


1988 September 1               (4649)             Daniel W. E. Green

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