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Latest Details
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Log in to retrieve additional aliases from SIMBAD. |
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| Name |
FG Sge |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
20 09 43.09 +20 11 03.3 |
| Proper motion |
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| Galactic coord. |
60.332 -7.393 |
Other names
(Internal only)
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Please note that aliases shown in grey link to obsolete records.
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2MASS J20115606+2020044 |
AAVSO 2007+20 |
ALS 10924 |
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AN 377.1943 |
ASAS J201156+2020.0 |
GSC 01626-00619 |
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HIP 99527 |
Hen 2-457 |
Hen 3-1844 |
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SON 3702 |
TYC 1626-619-1 |
ZTF J201156.05+202004.3 |
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| Variability type |
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FF |
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| Spectral type |
B4Ieq-K2Ib |
| Mag. range |
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8.7 - 23.0 V |
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| Discoverer |
-- |
| Epoch |
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| Outburst |
-- |
| Period |
-- |
| 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 |
Otero, Sebastian Alberto
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VSP Note: 12.3 Vmag. companion 8" to the East and 17.2 Vmag. companion 4" to the NE (see VSX image) |
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2 |
GCVS Team |
VB A (B 14.2m, 8", 100deg). The central star of the planetry nebula PK 60deg (diameter 36", the age about 6000 years). The brightness of the star steadily increased from 13.6 pg in 1894 to the maximum in 1967, and then is steadily decreasing. In 1982 it was 11.0 B. In 1967 the strong absorption lines of rare earth elements appeared in the spectrum. The spectral class steadily becomes later. The signes of new planetary nebula ejection were observed. In 1962 the star entered the instability strip in the Mv, B-V diagram and began to pulsate with a small amplitude and increasing period: Min(V) = 2442629 + 59.83d*E + 1.126d*E**2 (JD2442600 - 44530). In twenty years the period increased from 50d to 134d, the amplitude of pulsations changed from 0.2mV to 0.5mV; now it decreased again to 0.2mV, and the period is only 90d [V.P.Arkhipova, G.V.Zajtseva, R.I.Noskova, Yu.V.Voroshilov, M.V.Savel'eva, Astron. Tsirk. N1250, 1, 1983.]. |
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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 |
ZTF Catalog of Periodic Variable Stars (online data) |
2020arXiv200508662C |
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2 |
Chen, X.; et al., 2020, The Zwicky Transient Facility Catalog of Periodic
Variable Stars |
2020arXiv200508662C |
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3 |
Rosenbush, A. E.; Efimov, Y. S., 2015, Photometry, Spectrometry, and
Polarimetry of FG Sge in the Active State |
2015Ap.....58...46R |
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Clayton, G. C.; et al., 2006, V605 Aquilae: The Older Twin of Sakurai's
Object |
2006ApJ...646L..69C |
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5 |
C. Koen, L. Eyer, 2002, MNRAS 331, 45 |
2002MNRAS.331...45K |
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6 |
G.Pojmanski, Acta Astronomica 52, 397, 2002. |
2002AcA....52..397P |
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7 |
V.P.Arkhipova, Perem. Zvezdy 21, N5, 617, 1982. |
1982PZ.....21..617A |
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8 |
G.H.Herbig, A.A.Boyarchuk, ApJ 153, 397, 1968. |
1968ApJ...153..397H |
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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 = 7.22 | H = 6.38 | K = 5.43 | J - K = 1.78 |
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AllWISE
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W1 = 4.06 | W3 = 0.91 | W4 = 0.63 | W3 - W4 = 0.28 |
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Images
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Supporting Documents
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Campaigns/Programs
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LPV Double Trouble 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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