Central Bureau for Astronomical Telegrams
IAUC 4072: 1985e; V1302 Aql
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Circular No. 4072
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
COMET MACHHOLZ (1985e)
Ephemeris continuation from IAUC 4071:
1985 ET R.A. (1950.0) Decl. p r m1
July 6 8 21.46 +22 09.2 0.918 0.338 4.1
8 8 47.07 +22 04.6
10 9 12.60 +21 47.2 0.853 0.469 5.4
12 9 37.96 +21 16.2
14 10 02.95 +20 31.8 0.824 0.589 6.3
16 10 27.27 +19 35.4
18 10 50.64 +18 28.9 0.824 0.699 7.0
20 11 12.84 +17 14.7
22 11 33.69 +15 55.6 0.852 0.803 7.7
24 11 53.11 +14 33.9
26 12 11.10 +13 11.9 0.900 0.902 8.3
28 12 27.69 +11 51.1
30 12 42.94 +10 32.8 0.965 0.996 8.9
Aug. 1 12 56.97 + 9 17.7
Total visual magnitude estimates: June 1.48 UT, 8.8 (A. Hale,
Montrose, CA, 0.20-m reflector); 1.48, 9.1 (D. Machholz, San Jose,
CA, 0.15-m refl.); 5.46, 9.4 (G. Rattley, Magma, AZ, 0.25-m reflector);
5.46, 8.4 (Machholz, Loma Prieta, CA, 0.25-m reflector; moonlight);
6.46, 8.4 (Machholz). Observers are reporting coma diameters
about 2' and no visible tail. C. S. Morris corrects the time of
his and Hale's observations on IAUC 4067 to May 28.451.
V1302 AQUILAE
B. M. Lewis, J. Eder, and Y. Terzian, Arecibo Observatory,
report: "We find large changes in the 18-cm OH profiles of V1302 Aql
(= IRC +10420) since the last published observations (R. L. Mutel
et al. 1979, Ap.J. 228, 771). These masers are associated with an
F8-G0 supergiant star. Observations on May 13-15 at 1612 MHz (
resolution about 0.9 km/s) show that the strongest feature has increased
from about 40 to about 130 Jy, with a 4-percent excess of left-circular
polarization. The strongest feature has an LSR velocity of 45.4
km/s, but half the flux is now associated with features at velocities
> 50 km/s. May 21 observations at 1665 MHz show that there is
now emission across the whole profile (40-107 km/s) with the 15-Jy
feature having 30 percent right-circular polarization. New
infrared and H2O observations may be highly useful."
1985 June 7 (4072) Daniel W. E. Green
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