Central Bureau for Astronomical Telegrams
IAUC 5144: (2060); 1990j; 1990k
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Circular No. 5144
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 or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
(2060) CHIRON
W. and A. Cochran, University of Texas, report: "We obtained
spectroscopic observations of (2060) Chiron on 1989 Dec. 24 UT with
a long slit CCD spectrograph (range 310-590 nm). No molecular
emissions were observed, even after removal of the reflected solar
continuum spectrum; the upper limit for a possible CN feature at
388 nm was 2-3 x 10E-16 erg cmE-2 sE-1. This upper limit is
a factor of 2-3 less than the detection of CN by Bus et al. (Nature,
submitted) on 1990 Jan. 30. This implies that a CN outburst
occurred during this intervening period."
PERIODIC COMET MUELLER 2 (1990j)
Extension of ephemeris on IAUC 5132, from elements on
MPC 17401:
1990/91 R.A. (1950) Decl. Delta r m1
Dec. 15 0 47.19 + 4 55.6 1.531 2.092 17.1
25 0 58.56 + 5 28.2
Jan. 4 1 11.69 + 6 15.9 1.762 2.111 17.5
14 1 26.26 + 7 15.0
24 1 42.05 + 8 22.6 2.010 2.140 17.8
Feb. 3 1 58.84 + 9 35.3
13 2 16.45 +10 50.7 2.265 2.179 18.2
23 2 34.75 +12 06.1
Mar. 5 2 53.61 +13 19.6 2.519 2.226 18.5
15 3 12.94 +14 29.1
25 3 32.64 +15 33.1 2.765 2.281 18.8
PERIODIC COMET HOLT-OLMSTEAD (1990k)
Extension of ephemeris on IAUC 5116, from elements on
MPC 17401:
1990/91 R.A. (1950) Decl. Delta r m1
Dec. 15 0 55.17 +17 32.6 1.475 2.111 18.1
25 1 03.04 +18 43.7
Jan. 4 1 13.34 +20 00.0 1.725 2.153 18.5
14 1 25.69 +21 20.1
24 1 39.78 +22 42.9 1.996 2.203 18.9
Feb. 3 1 55.32 +24 06.9
13 2 12.09 +25 30.3 2.276 2.260 19.3
1990 December 12 (5144) Daniel W. E. Green
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