Central Bureau for Astronomical Telegrams
IAUC 4199: eta Car; 1986 EB; R CrB
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Read IAUC 4200
Circular No. 4199
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
eta CARINAE
P. A. Whitelock, South African Astronomical Observatory,
telexes: "Observations by the SAAO infrared group show that the JHKL
magnitudes of eta Car have brightened by ~ 0.2 over the past year.
There appears to be evidence that the infrared variations are
quasiperiodic on a timescale of ~ 1800 days, in which case a maximum
is to be expected around the middle of 1986."
1986 EB
The following orbital elements are from MPC 10545.
T = 1985 Oct. 2.7878 ET
Peri. = 359.3176 e = 0.280624
Node = 358.0381 1950.0 a = 0.973841 AU
Incl. = 23.4122 n = 1.0255851
q = 0.700558 AU P = 0.96 years
1986 ET R.A. (1950.0) Decl. p r V
Mar. 21 10 31.44 +17 56.9 0.275 1.246 14.6
26 10 07.94 +14 09.3
31 9 49.53 +10 35.3 0.316 1.247 15.2
Apr. 5 9 35.74 + 7 22.5
10 9 25.87 + 4 32.1 0.372 1.242 15.8
15 9 19.22 + 2 02.0
20 9 15.16 - 0 11.1 0.436 1.232 16.3
25 9 13.15 - 2 10.7
30 9 12.77 - 3 59.4 0.501 1.217 16.7
May 5 9 13.73 - 5 40.0
10 9 15.78 - 7 14.4 0.562 1.196 17.0
15 9 18.74 - 8 44.4
20 9 22.44 -10 11.3 0.616 1.171 17.2
25 9 26.75 -11 36.1
30 9 31.57 -12 59.4 0.661 1.140 17.4
R CORONAE BOREALIS
K. Krisciunas reports a photoelectric observation of R CrB on
Mar. 9.517 UT with an 0.15-m reflector at Mauna Kea: V = 7.78 +/-
0.01, B-V = +0.58 +/- 0.02 (comparison star HD 141352).
1986 March 31 (4199) Daniel W. E. Green
Read IAUC 4200
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