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Details for Revision 2
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  FF Aql  
Aquila Sequence
18 58 14.75 +17 21 39.3  (284.56146 +17.36092) Search nearby
B1950.0 18 56 01.23 +17 17 32.0
Galactic coord. 49.205 +6.363
Other names

(Internal only)
AAVSO 1853+17 ADS 11884 A BD+17 3799
GSC 01589-02551 HD 176155 HIP 93124
HR 7165 SAO 104296  
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Variability type
Spectral type F5Ia-F8Ia
Mag. range
5.18 - 5.68 V
Discoverer --
15 Sep 1972 (HJD 2441576.428) Ephemeris
Outburst --
Period 4.470916 d
Rise/eclipse dur. 48%
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1 Billiaert, Bruno Possible quadruple system. Spectroscopic A9/F3V companion. P= 1438.76 d.
2 Otero, Sebastian Alberto Not an overtone cepheid from its absolute magnitude (-3.05 +/-0.15). Secondary is F1V.
3 GCVS Team ADS 11884 A (B 10.37m, 7", 141deg). SB1 (P = 1435d).
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1 -- astro-ph/0612465
2 Breitfelder, J.; et al., 2016, Observational calibration of the projection
factor of Cepheids. II. Application to nine Cepheids with HST/FGS parallax
3 Berdnikov, L. N.; Turner, D. G.; Henden, A. A., 2014, FF Aql BV light
4 Benedict, G. F.; et al., 2007, Hubble Space Telescope Fine Guidance Sensor
Parallaxes of Galactic Cepheid Variable Stars: Period-Luminosity Relations
5 L.Szabados, Bud Mitt N70, 1977. 1977CoKon..70....1S
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Revision History
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3 Billiaert, Bruno 2016-02-03 08:11 UTC Period and epoch from 2016arXiv160104727B. Type, rise duration and range from 2014yCat..80910299B and HIPPARCOS data.
2 Otero, Sebastian Alberto 2007-02-25 14:23 UTC --
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.