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Latest Details
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| Name |
U Lac |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
22 45 39.76 +54 53 39.0 |
| Proper motion |
| RA: -3.333 +/- 0.054 mas/y | Dec: -3.039 +/- 0.052 mas/y | Source: Gaia DR1 |
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| Galactic coord. |
105.822 -3.550 |
Other names
(Internal only)
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2MASS J22474341+5509303 |
AAVSO 2243+54 |
AN 2.1902 |
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ASASSN-V J224743.39+550929.4 |
BD+54 2863 |
DO 41988 |
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GSC 03988-01641 |
HD 215924 |
HIP 112545 |
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IRAS 22456+5453 |
IRC +50446 |
PPM 41110 |
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RAFGL 2957 |
TIC 343778934 |
TYC 3988-1641-1 |
(Not logged in) Add name
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| Variability type |
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SRC |
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| Spectral type |
M4Iabep+B |
| Mag. range |
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8.1 - 10.2 V |
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| Discoverer |
Thomas Espin (1894) |
| Epoch |
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| Outburst |
-- |
| Period |
432 d |
| Rise/eclipse dur. |
-- |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
Huziak, Richard
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The "Original Reference" (S.Gaposchkin, HA 118, N26, 1952) for U Lac cited in VSX (and thus in the GCVS) is incorrect for U Lac, and no reference to U Lac is seen in that publication. T. W. Backhouse states in "Astronomische Nachrichten" (1902AN....158..383K) that the star AN 2.1902 (now U Lac) was announced in "The Observatory for Jul 1897 p.278" and was discovered by him as variable, and that the star was first listed in Espin's revision of "Birmingham's Catalogue of Red Stars" as #735. |
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2 |
GCVS Team |
There are light variations with the periods: 150d, 550 - 690d, 2900d. |
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References
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Click reference title/citation to view in new window. Roll over index number to view submission details.
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1 |
Perryman, M. A. C., et al., 1997, The HIPPARCOS Catalogue |
1997HIP...C......0E |
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2 |
S.Gaposchkin, HA 118, N26, 1952. |
1952AnHar.118...25G |
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3 |
N.F.Florja, Tr. Gos. Astron. Inst. Sternberg 16, 187, 1949. |
1949TrSht..16..187F |
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4 |
Cannon, A. J., 1907, Second catalogue of variable stars |
1907AnHar..55....1C |
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 3.81 | H = 2.67 | K = 1.93 | J - K = 1.88 |
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AllWISE
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W3 = -0.89 | W4 = -1.92 | W3 - W4 = 1.04 |
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APASS-DR9
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B = 11.15 | V = 8.89 | g' = 10.46 | r' = 7.86 | i' = 6.19 | B - V = 2.26 |
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Images
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Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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There are currently no supporting documents on file for this star.
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Stellar Association Membership
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ASCC 123 |
Open Cluster |
2012A&A...548A..97Z |
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Campaigns/Programs
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SNEWS Campaign
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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