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Latest Details
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| Name |
V1489 Cyg |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
20 44 33.92 +39 55 57.0 |
| Galactic coord. |
80.798 -1.921 |
Other names
(Internal only)
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2MASS J20462554+4006594 |
AAVSO 2042+39 |
ASASSN-V J204625.54+400659.4 |
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IRC +40448 |
NML Cyg |
OH 80.8 -1.9 |
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RAFGL 2650 |
SDSS J204625.54+400659.5 |
TIC 66995250 |
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[A70] 78-0-133 |
[LFO93] 2044+39 |
[PCC93] 428 |
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| Variability type |
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SRC |
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| Spectral type |
M4.5-M7.9Ia-III: |
| Mag. range |
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16.0: - 18.0: V |
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| Discoverer |
-- |
| Epoch |
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| Outburst |
-- |
| Period |
1280 d (3.50 y) |
| 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 |
GCVS Team |
NML Cyg. 17.0m: - 18.0m V, B>21M; I - K = +8.17. Very large IR exess due to expanding gaseous-dust envelope. In the area 2.5"*3.5" around the star the system of about 60 discrete sources of OH emission is detected [R.D.Davies, M.R.Masheder, R.S. Booth, Nature Phys SCI, 237, 21, 1972.]; source of OH, H2O, SiO maser emission. Light variations are periodical (see also [G.V.Khozov, T.N.Khydyakova, V.M. Larionov, L.V.Larionova, Tr. Astron. Obs. Leningrad 34, N397, 68, 1978.]). The object may be a protostar being observed at the end of condensation process. The late spectrum arises probably in the extending envelope [G.H.Herbig, ApJ 189, 75, 1974., J.J.Daniel, AsAp 111, 58, 1982.]. |
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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 |
Zhang, B.; Reid, M. J.; Menten, K. M.; et al., 2012, The distance and size
of the red hypergiant NML Cygni from VLBA and VLA astrometry |
2012A&A...544A..42Z |
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2 |
D.W.Strecker, AJ 80, N6, 451, 1975. |
1975AJ.....80..451S |
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3 |
G.Neugebauer, D.E.Mertz, R.B. Leighton, ApJ 142, 399, 1965. |
1965ApJ...142..399N |
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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 = 4.88 | H = 2.39 | K = 0.79 | J - K = 4.09 |
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SDSS-DR12
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u = 17.15 | g = 21.03 | r = 15.76 | i = 15.44 | z = 10.38 | u - g = -3.88 | r - i = 0.33 |
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Images
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Supporting Documents
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Revision History
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