Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4898: IR SOURCE IN BERKELEY 87; 1989o

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 4897 SEARCH Read IAUC 4899
IAUC number 

                                               Circular No. 4898
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


INFRARED SOURCE IN BERKELEY 87
     I. G. Martinez-Pais, Instituto de Astrofisica de Canarias,
La Laguna; F. Giovannelli, Istituto di Astrofisica Spaziale, CNR,
Frascati; L. Manade, Instituto de Astrofisica de Canarias, La
Laguna; L. Norci, Istituto di Astronomia, Universita 'La Sapienza',
Rome; V.F. Polcaro, Istituto di Astrofisica Spaziale, CNR,
Frascati, and Dipartmento di Aerospaziale, Universita 'La Sapienza',
Rome; and C. Rossi, Istituto di Astronomia, Universita 'La
Sapienza', Rome, write:  "We have performed a photometric infrared
(J, H, K, L) survey of the open cluster Berkeley 87 with the 1.5-m
telescope at the Teide Observatory (Canary Is.) using a cooled
InSb photometer with a chopping system for sky subtraction.  A
strong source (H = 9.32; K = 7.14; L = 5.14) has been found at
R.A. = 20h19m17s.5, Decl. = +37 20'57" (equinox 1950.0).  The
source does not seem to have an optical couterpart (to V = 15),
it is undetectable in the J band, and it is not listed in the IRAS
catalogue.  Furthermore, we notice the unusual infrared excess of
star number 73 in Turner and Forbes 1982 (P.A.S.P. 94, 789).  This
star has B = 14.47 and B-V = +2.64 (ibid.), while the near-infrared
magnitudes are J = 8.95, H = 7.74, K = 7.29."


PERIODIC COMET BRORSEN-METCALF (1989o)
     Ephemeris from orbital elements on MPC 14747:

     1989/90      R.A. (1950) Decl.     Delta      r       m1
     Nov. 30    13 52.76    -24 32.7    2.368    1.650    13.0
     Dec. 10    14 09.32    -27 03.1
          20    14 23.96    -29 17.7    2.500    1.950    13.9
          30    14 36.65    -31 19.8
     Jan.  9    14 47.25    -33 11.7    2.560    2.234    14.5
          19    14 55.58    -34 55.1
          29    15 01.38    -36 30.8    2.559    2.504    15.0
     Feb.  8    15 04.38    -37 58.7
          18    15 04.30    -39 17.8    2.522    2.763    15.4
          28    15 00.92    -40 25.4
     Mar. 10    14 54.21    -41 18.0    2.483    3.011    15.8
          20    14 44.40    -41 50.9
          30    14 32.08    -41 59.8    2.488    3.250    16.1


1989 November 7                (4898)             Daniel W. E. Green

Read IAUC 4897 SEARCH Read IAUC 4899

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!