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Name
  VSX J005240.5+563550  
AAVSO UID
--  
Constellation
Cassiopeia Sequence
J2000.0
00 52 40.59 +56 35 50.3  (13.16912 +56.59729) Search nearby
B1950.0 00 49 44.53 +56 19 32.9
Galactic coord. 123.103 -6.274
Other names

(Internal only)
NOMAD1 1465-0032709 UCAC3 294-019523 USNO-B1.0 1465-0031530
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Variability type
DSCT
Spectral type --
Mag. range
13.47 V (0.025)CV
Discoverer Riccardo Furgoni
Epoch
15 Oct 2011 (HJD 2455850.3173) Ephemeris
Outburst --
Period 0.106 d  (2.5 h)
Rise/eclipse dur. --
Remarks
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1 Furgoni, Riccardo For this star the value of NOMAD1 B-V is 0.52 and 2MASS J-K is 0.468. These are too high for a star Delta Scuti. However the star is immersed in the nebula NGC281 and nearby stars with a known spectrum show unusual B-V values. For example, the nearby star UCAC3 294-019371 has a NOMAD1 B-V of 0.31, but a spectrum B2V (usually with B-V -0.21): in this case the reddening is 0.52V. The other nearby star UCAC3 294-019584 has a NOMAD1 B-V 0.025, but a spectrum O9V (usually with B-V -0.30): in this case the reddening is 0.32 V. If the average reddening of these stars is 0.42V then VSX J005240.5+563550's B-V would become 0.10 instead of 0.52 with a probable spectrum A4, compatible with the delta Scuti class. The redness is therefore probably due to dust and gases that form the structure of the nebula NGC281.
2 Furgoni, Riccardo V Magnitude derived from UCAC3 f-mag.
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References
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Supporting Documents
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3 Phase Plot and Fourier Spectrum Furgoni, Riccardo 2011-12-11 15:56 UTC Period=0.12498 JD
2 Phase Plot Furgoni, Riccardo 2011-10-25 19:58 UTC Period = 0.106
1 Light Curve and Finding Chart Furgoni, Riccardo 2011-10-25 19:58 UTC
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Stellar Association Membership
 IC 1590 Open Cluster 2012A&A...548A..97Z
Revision History
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2 Furgoni, Riccardo 2011-12-11 15:56 UTC Period improvement and possible explanation of B-V and J-K unusual values for a delta Scuti star.
1 Furgoni, Riccardo 2011-10-26 09:03 UTC Initial submission.

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