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Name
  X Lac  
AAVSO UID
000-BCW-160 (705 observations)  
Constellation
Lacerta Sequence
J2000.0
22 49 03.18 +56 25 41.5  (342.26325 +56.42819) Search nearby
B1950.0 22 47 00.42 +56 09 48.3
Proper motion
RA: -3.316 +/- 0.056 mas/yDec: -1.467 +/- 0.050 mas/ySource: Gaia DR1
Galactic coord. 106.569 -2.505
Other names

(Internal only)
AAVSO 2245+55 AN 88.1906 ASASSN-V J224902.96+562542.1
BD+55 2817 HD 216105 HIP 112675
SAO 34850 TYC 3992-2327-1  
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Variability type
DCEPS
Spectral type F6-G0
Mag. range
8.19 - 8.60 V
Discoverer Frederick Seares (1907)
Epoch
21 Nov 1975 (HJD 2442738.132) Ephemeris
Outburst --
Period 5.44499 d
Rise/eclipse dur. 31%  (40.5 h)
Remarks
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1 GCVS Team P var. Max = 2418890.497 + 5.444303d*E (JD2416670 - 29500) [W.Dziewulski, W.Iwanowska, Torun Bull N1, 1946.]; since JD2429500 - see Table.
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References
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1 Photoelectric observations of Cepheids in UBV(RI)c (Berdnikov, 2008) 2008yCat.2285....0B
2 L.Szabados, Bud Mitt N76, 1980. 1980CoKon..76....1S
3 C.Payne, HB N883, 1931. --
4 Dunér, N. C.; Hartwig, E.; Muller, G., 1907, Benennung von neu entdeckten
veränderlichen Sternen
1907AN....176..181.
External Links
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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 = 6.39H = 6.07K = 5.95J - K = 0.44
AllWISE W1 = 5.93W2 = 5.83W3 = 5.93W4 = 5.88W1 - W2 = 0.11W3 - W4 = 0.05
Images
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Supporting Documents
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Stellar Association Membership
 ASCC 123 Open Cluster 2012A&A...548A..97Z
Revision History
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4 Fernig, Leo 2022-09-21 20:29 UTC Discoverer updated from 1907AN....176..181. p192
3 Otero, Sebastian Alberto 2016-10-16 08:39 UTC Rise duration and range from HIPPARCOS and 2008yCat.2285....0B data.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.