TA e-circular

<title>TA e-circular</title>
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THE ASTRONOMER Electronic Circular No 399 1990 Apr 4 17.10UT
Microlink:MAG60138 JANET:GMH at UK.AC.RO-GREENWICH.STARLINK
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074
Telex: 94082518 Answerback: TAGUY
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NSV 02557 (Q1990/26)
Mike Collins, Sandy, reports that he has identified a variable
object on UK Nova/Supernova Patrol photographs of 1990 Mar 14.9UT,
when the magnitude was 10.7 (K2415 film). On 1989 Oct 8.2UT it
was estimated at 9.4.The position is: RA 05h38.3m DEC +12 16'(1950)
which coincides with the suspected variable NSV 02557. An e-mail
version of the chart is available from Mike Collins (MAG36908) and
paper version from the Editor.
 
NO SUPERNOVA IN NGC 3359 (cf E398)
Several observers have reported that they have checked NGC 3359 but
find no new object corresponding to the star suspected by Dave
Greenwood on Mar 27 (not Mar 28 as stated on E398).
 
COMET SKORICHENKO-GEORGE (1989e1)
     Improved parabolic orbital elements from MPC 16205:
     T = 1990 Apr. 11.9389 ET         Peri. = 137.8482
                                      Node  = 279.3118  1950.0
     q = 1.569001 AU                  Incl. =  59.3652
Ephemeris:
     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Apr.  4     2 07.03    +41 54.8
           9     2 30.25    +41 23.6    2.219    1.570     8.7
          14     2 52.72    +40 40.7
          19     3 14.30    +39 47.4    2.283    1.572     8.8
          24     3 34.91    +38 45.1
          29     3 54.49    +37 35.4    2.360    1.586     8.9
     May   4     4 13.03    +36 19.5
           9     4 30.56    +34 58.6    2.446    1.612     9.0
          14     4 47.12    +33 33.9
          19     5 02.77    +32 06.2    2.538    1.649     9.2
IAUC 4984
 
COMET CERNIS-KIUCHI-NAKAMURA (1990b)
     Improved parabolic orbital elements from MPC 16205, based on
observations Mar. 17-27:
     T = 1990 Mar. 17.296 ET          Peri. = 100.588
                                      Node  = 347.727   1950.0
     q = 1.06849 AU                   Incl. =  48.138
Ephemeris:
     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Apr.  4     3 17.17    +51 48.6
           9     4 01.76    +52 04.5    1.299    1.133     8.6
          14     4 46.28    +51 19.9
          19     5 28.29    +49 39.1    1.322    1.197     8.9
          24     6 06.19    +47 13.2
          29     6 39.38    +44 16.2    1.392    1.277     9.3
IAUC 4986
 
COMET AUSTIN (1989c1)
Rob McNaught, observing from Prestwick, reports observation of this
comet at m1=5.2 on 1990 Apr 3.85UT. No tail was seen, and the coma
was of 1.5' diameter, DC7 (9x63B)
 
DWARF NOVA ALERT
40 different dwarf novae were observed and reported last night. A
summary was telephoned to professional astronomers and IR Gem is
a possible target for IUE as it enters a supermaximum. Coverage
of all dwarf novae is needed again tonight with deadline for
telephone reports 10pm BST (21.00UT).
 
Guy M Hurst
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