16 Cygni

Summary

Visual magnitude: 5.96
Distance: 65.0 +/- 3.0 light years
Luminosity: 1.33 +/- 0.12 x Sun's luminosity

Position information for 01 ene 2000 0:00:00
(Julian day number 2451544.41667)

Apparent RA (epoch of date):	19h 41m 46.62s
Apparent Dec (epoch of date):	+50° 31' 36.7"
Constellation: Cygnus

Altitude:	+10° 44' 3"
Azimuth:	330° 38' 29"

Transit:		15h 14m 37s
The star is circumpolar and never rises or sets

Names and Catalog Numbers

Flamsteed number:	16 Cygni
Tycho catalog number:	TYC 3565-1524-1
PPM number:		PPM 37671
Henry Draper number:	HD 186408
DM number:		BD +50 2847 

Star Atlas Chart Numbers

Herald-Bobroff Astroatlas, Chart C-6
Millennium Star Atlas, Charts 1109-1110 (Vol III)
Sky Atlas 2000.0, Chart 3
Uranometria 2000 Chart 55, Vol 1

Tycho Catalog Data

Tycho Catalogue (ESA SP-1200, 1997).

Tycho Identifier/Proximity Flag

Catalog number: TYC 3565-1524-1

Proximity flag: None

Descriptor

V magnitude: 5.96
Source of V magnitude: Johnson UBV photometric system.

Astrometric Data

Equatorial coordinates (epoch J2000.0, ICRS)

RA:	19h 41m 48.9557s
Dec:	+50° 31' 30.245"

Standard errors of the equatorial coordinates (epoch J1991.25)

RA:	0.0022 arcsec
Dec:	0.0020 arcsec

Astrometric reference flag: This is a dubious astrometric reference star in the context of the Tycho catalog.

Trigonometric parallax: 0.05020 arcsec
Standard error of the parallax: 0.00240 arcsec

Proper motion components (epoch J1991.25, ICRS)

RA:	-0.22934 arcsec/yr
Dec:	-0.15570 arcsec/yr

Standard errors of the proper motion components

RA:	0.0044 arcsec
Dec:	0.0026 arcsec

Number of accepted data points: 111
Goodness-of-fit parameter, F2: -0.67

Hipparcos catalog number: 96895

Astrometric quality flag: 1 (very high).
Signal-to-noise ratio of the star image, Fs: 11.4

Source of astrometric data: Standard data processing.

Photometric Data

Mean Bt magnitude: 6.762
Standard error: 0.005

Mean Vt magnitude: 6.034
Standard error: 0.004

Source of photometric data: The Bt,Vt data are median values, rather than de-censored mean values (mainly relevant for bright stars with Bt<=8.5 mag and Vt<=8.0 mag).

Johnson B-V colour index: 0.651
Standard error: 0.005

Number of transits used in mean photometry: 149
Vt scatter, s: 0.041 mag
Vt magnitude at maximum luminosity: 5.99
Vt magnitude at minimum luminosity: 6.07

Previously known or suspected variability: None.

Variability of the Tycho measurements: None.

Unresolved duplicity status: Unresolved duplicity is clearly indicated in the data for this star. The published Tycho mean photometry is for the combined light, except for astrometrically resolved components.

Cross-identification and Notes

PPM identifier: PPM 37671
HD identifier: HD 186408
DM identifier: BD +50 2847 








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