TA e-circular

<title>TA e-circular</title>
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THE ASTRONOMER Electronic Circular No 522       1991 May 19 13.25UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP, England. Telephone:  (0256)471074 Int:+44256471074
Telex: 9312111261 Answerback: TA G                     JANET BOXES:
GMH at UK.AC.CAM.ASTRONOMY.STARLINK or GUYH at UK.AC.SUSSEX.CLUSTER
TELECOM GOLD: 10074:MIK2885                       PRESTEL 256471074
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NSV 12441
Nick James, Chelmsford, reports that he has detected possible
variability in SAOC 105311 (RA 19h47m13s DEC +18 43'48",1950)
on photographs taken for the UK Nova/Supernova Patrol. The SAOC
gives mv=8.8, Spectral Class K7. on 1991 May 9 he estimated it
at magnitude 8.9 whereas on a master slide of 1990 March 2 it
was slightly fainter at magnitude 9.3.
Mike Collins, Sandy, has identified the star as the suspected
variable NSV 12441 = IRAS 19472+1843 = BD +18 4258 = HD 350668
= Dearborn 18207 (latter has red magnitude 8.7, Sp=K5).
The entry in the NSV gives the photographic range as 9-9.5,
type LB and the identity S 8326 (Sonneberg variable),
originally discovered by Hoffmeister.
The following e-chart has been prepared by N.James:
\\\\\\NSV 12441 = SAO 105311 Discovered by Hoffmeister
S,120,20,S
P,19h 47m.2 +18 44' (1950.0)
O,60,60,9,9.5
M,7,30,59
R,7.8,19,96,A,R
R,8.8,69,80,B
R,9.0,115,76,C
R,9.4,90,47,D
M,9,61,1,22,20
R,9.7,98,110,E
M,10,17,112,64,80,55,109,19,83,112,104,23,82
R,10.1,42,27,F
M,10,99,113,101,114,112,58,1,32,103,75,100,11
M,11,108,105,118,82,15,96,49,106,79,109,19,102,72,86
M,11,7,88,60,88,19,109,39,110,75,79,86,94,103,96
M,11,103,89,79,100,2,94,43,99,29,99,80,105,86,60
M,11,41,45,10,41,10,67,113,54,3,48,34,49,10,40
M,11,110,31,82,64,38,62,31,52,7,59,110,58,28,68
M,11,23,38,103,32,35,29,116,78,61,77,66,65,26,54
M,11,33,46,73,60,60,3,60,8,26,14,54,14,95,20
M,11,69,16,29,6,46,23,107,25,16,25,100,25
E,77
////// Basic chart automatically generated by GSC2FIND ver 1.0

1991 JX
     E. Helin reports her discovery of a fast-moving asteroidal
object on films exposed by K. Lawrence, P. Rose, and herself with
the 0.46-m Schmidt telescope at Palomar on 1991 May 9.
Preliminary orbital elements by G. Williams, Center for
Astrophysics: (IAUC 5268)
     T = 1991 June 25.583 ET          Peri. =  63.792
     e = 0.55825                      Node  = 212.666   1950.0
     q = 1.01256 AU                   Incl. =   2.198
       a =  2.29215 AU     n = 0.284013     P =   3.47 years
     1991 ET      R.A. (1950) Decl.     Delta      r       V
     May  20    13 56.21    - 3 17.1    0.115    1.112    14.8
          22    13 59.08    - 2 02.4
          24    14 02.81    - 0 35.7    0.096    1.093    14.5
          26    14 07.63    + 1 06.5
          28    14 13.88    + 3 09.4    0.078    1.075    14.1
          30    14 22.08    + 5 40.3
     June  1    14 33.01    + 8 49.4    0.060    1.059    13.6
           3    14 47.91    +12 51.3
           5    15 08.90    +18 05.0    0.045    1.046    13.1
Guy M Hurst
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