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  FF Aql  
000-BCD-764 (4906 observations)  
Aquila Sequence
18 58 14.75 +17 21 39.3  (284.56146 +17.36092) Search nearby
B1950.0 18 56 01.23 +17 17 32.5
Proper motion
RA: -0.103 +/- 0.028 mas/yDec: -9.329 +/- 0.035 mas/ySource: Gaia DR1
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 - 5.51 V
Discoverer --
31 Jul 1984 (HJD 2445912.675) Ephemeris
Outburst --
Period 4.470848 d
Rise/eclipse dur. 45%  (48.29 h)
Some references may be clicked to view in new window. Roll over index number to view submission details.
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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Click reference title/citation to view in new window. Roll over index number to view submission details.
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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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 = 4.03H = 3.74K = 3.52J - K = 0.51
AllWISE W1 = 3.51W2 = 2.94W3 = 3.42W4 = 3.38W1 - W2 = 0.57W3 - W4 = 0.05
Please review Digitized Sky Survey Acknowledgment and Copyright.
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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.