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Date: Sat, 30 Oct 1993 22:32:16 +0200
From: granslo@argo.uio.no
Subject: NAS.VSS Observations of R CrB
Norwegian Astronomical Society - Variable Star Section
OBSERVATIONS OF R CORONAE BORELALIS - REPORT NO. 002 (1993 October 30)
=======================================================================
This report contains observations of R CrB by members of NAS.VSS since
1992 July 1. Time system is year, month number and date with decimals in
Universal Time.
YYYY MM DD.DDD OBSERVATION MAG CL INSTRUM. OBSERVER
1993 07 06.98 5.9 B7x50 Heen, L. T.
1993 07 15.95 5.9 B7x50 Heen, L. T.
1993 07 15.99 a-4;d+5 6.0 2 B7x35 Granslo, B. H.
1993 07 19.97 5.9 B7x50 Heen, L. T.
1993 07 22.96 5.9 B7x50 Heen, L. T.
1993 07 29.99 a-4 6.0: 2 B7x35 Granslo, B. H.
1993 08 06.95 a-3;c+5 5.9 B7x50 Heen, L. T.
1993 08 10.88 a-5;c+3 6.2 B7x50 Heen, L. T.
1993 08 16.90 a-3;c+5 5.9 B7x50 Heen, L. T.
1993 08 17.97 a-2;c+7 5.8 1 B7x35 Granslo, B. H.
1993 08 24.92 a-6;b-4;c+3 6.2 1 B7x35 Granslo, B. H.
1993 08 26.95 a-6;c+2;d+4 6.3 1 B7x35 Granslo, B. H.
1993 08 27.96 a-8;c=v;d+2;e+8 6.5 1 B7x35 Granslo, B. H.
1993 08 28.92 c-1;d+1 6.6 2 B7x35 Granslo, B. H.
1993 09 03.887 d-6;x-2.5;e-1;f+4 7.3 1 C203,80x Granslo, B. H.
1993 09 04.858 x-5;e-4;f=v;g+3;h+7 7.6 1 L76,40x Granslo, B. H.
1993 09 04.936 7.1 Dahle, H.
1993 09 07.864 c-6;d-5;e+1;f+5 7.1 2 B7x35 Granslo, B. H.
1993 09 07.906 7.5 Dahle, H.
1993 09 08.923 e-3;f+1;g+4 7.5 1 C203,80x Granslo, B. H.
1993 09 09.89 7.2 B7x50 Heen, L. T.
1993 09 09.931 e-2;f+2;g+6 7.4 1 C203,80x Granslo, B. H.
1993 09 12.88 7.0: B7x50 Heen, L. T.
1993 09 14.90 7.1 B7x50 Heen, L. T.
1994 09 16.92 7.0 B7x50 Heen, L. T.
1993 09 17.93 c-4;d-2;e+3 6.9 1 B7x35 Granslo, B. H.
1993 09 18.83 c-4;e+3 6.9 1 L6x30 Granslo, B. H.
1993 09 18.89 7.0 Dahle, H.
1993 09 22.838 c-4;e+3 6.9 2 B7x35 Granslo, B. H.
1993 09 28.87 6.7 B7x50 Heen, L. T.
1993 09 29.837 c-2;d=v 6.7 2 B7x35 Granslo, B. H.
1993 10 13.76 e-4;f+1;g+3 7.6 1 C203,80x Granslo, B. H.
1993 10 16.89 e-7;f-3;g=v 7.9 2 L76,40x Granslo, B. H.
1993 10 17.762 e-6;f-1;g+1 7.8 1 C203,80x Granslo, B. H.
1993 10 21.874 e-7;f-3;g-1;k+5 8.0 2 L76,40x Granslo, B. H.
1993 10 22.799 e-7;f-2;g=v;k+6 7.9 1 C203,80x Granslo, B. H.
1993 10 28.802 g-3;k+3;l+5 8.3 1 L60,55x Granslo, B. H.
1993 10 29.809 f-5;g-3;k+3 8.2 2 L60,36x Granslo, B. H.
1993 10 30.831 g-4;k+3 8.3 2 L60,55x Granslo, B. H.
Magnitudes are calculated from Pogson's step method. CL = class: estimated
accuracy of observation; 1 = good (+/- 0.1 mag.), 2 = fair (+/- 0.2 mag.).
Instrument (aperture in mm): B = binoculars, C = Schmidt-Cassegrain,
L = refractor. Comparison stars:
Ident R.A. (2000.0) Decl. Mag. Spec. SAO Source
h m s o ' " no.
a 15 43 59.3 +32 30 57 5.6 G9 64870 AAVSO
b 16 16 44.8 +29 09 01 5.9 A3 84281 AAVSO
c 15 36 53.4 +29 59 28 6.5 F5 64808 AAVSO
d 15 48 01.8 +31 44 09 6.7 K5 64915 AAVSO
x 15 59 05.9 +29 25 54 7.1 K2 84124 SC 2000
e 15 47 40.8 +28 28 10 7.2 F6 84005 AAVSO
f 15 52 30.9 +28 54 47 7.6 K3 84053 AAVSO
g 15 45 07.5 +28 28 12 7.9 K0 83985 AAVSO
h 15 53 08.5 +27 48 52 8.3 K2 84057 AAVSO
k 15 47 07.0 +29 06 14 8.6 K5 84000 AAVSO
l 15 45 45.0 +28 58 09 8.9 K2 83991 AAVSO
Sources: AAVSO = American Association of Variable Star Observers,
SC 2000 = Sky Catalogue 2000.0. The position of R CrB (SAO 84015) is
R.A. = 15h 48m 34s.4 Decl. = +28d 09' 24" (2000.0).
Observers: Haakon Dahle (Oslo, Norway); Bjorn H. Granslo (Fjellhamar,
Norway); Lars Heen (Trondheim, Norway).
Regards,
Bjorn H. Granslo
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