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Name
  X Tri  
AAVSO UID
000-BBD-381 (20369 observations)  
Constellation
Triangulum Sequence
J2000.0
02 00 33.74 +27 53 19.2  (30.14058 +27.88867) Search nearby
B1950.0 01 57 42.44 +27 38 50.0
Proper motion
RA: 25.914 +/- 0.215 mas/yDec: -14.031 +/- 0.178 mas/ySource: Gaia DR1
Galactic coord. 141.078 -32.536
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J020034.3+275303 1SWASP J020033.73+275319.2 AAVSO 0154+27
ASAS J020034+2753.3 BD+27 318 HD 12211
HIP 9383 HV 3551 NSVS 6509066
SAO 75082 SVS 7  
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Variability type
EA/SD
Spectral type A5V+G0V
Mag. range
8.55 - 11.27 V
Discoverer --
Epoch
31 Mar 1975 (HJD 2442502.721) Ephemeris
Outburst --
Period 0.9715352 d  (23.31684 h)
Rise/eclipse dur. 18%
Remarks
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1 GCVS Team VB A (B 13.3m, 6.7", 55.3deg, 1952). Usual brightness in Max 8.88. d = 0.013P; Min II 9.07. According to [P.Rovithis, H.Rovithis-Livaniou, IBVS N2448, 1983.], a two-peaked flare-like event of 35 min duration (Delta(V) = 0.33m) was observed at JD2445594.4550. P var. Min = 2422722.269 + 0.9715342d*E (JD2422700 - 26600); Min = 2426946.508 + 0.9715390d*E (JD2426600 - 33400); Min = 2433504.397 + 0.9715290d*E (JD2433400 - 35500); Min = 2435687.422 + 0.9715352d*E (JD2435500 - 39200); Min = 2439375.373 + 0.9715277d*E (JD2439200 - 42500) [P.Ahnert, MVS 6, H.5, 117, 1973.]; since JD2442500 - see Table.
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References
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1 Norton A.J. et al., 2007, astro-ph/0702631 2007astro.ph..2631N
2 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
3 Sky and Tel 66, N5, 432, 1983. 1983S&T....66....5F
4 Bob Nelson's O-C files, 2016 --
5 CALEB - Catalog and AtLas of Eclipsing Binaries --
6 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
7 J.S.Shaw, D.Hou, University of Georgia, 2005. --
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 8.49H = 8.27K = 8.18J - K = 0.31
AllWISE W1 = 7.89W2 = 7.92W3 = 7.90W4 = 7.48W1 - W2 = -0.02W3 - W4 = 0.42
APASS-DR9 B = 9.06V = 8.76g' = 9.19r' = 8.74i' = 8.70B - V = 0.30
SDSS-DR12 u = 12.48g = 13.78r = 13.77i = 13.64z = 12.57u - g = -1.29r - i = 0.13
Images
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Supporting Documents
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Revision History
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2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.