Download HD 177830

HD 177830
Summary
Visual magnitude: 7.17
Distance: 199 +/- 36 light years
Luminosity: 4.08 +/- 1.60 x Sun's luminosity
Position information for 01 ene 2000 0:00:00
(Julian day number 2451544.41667)
Apparent RA (epoch of date): 19h 05m 18.61s
Apparent Dec (epoch of date): +25° 55' 18.2"
Constellation: Lyra
Altitude:
Azimuth:
-13° 52' 32"
323° 18' 21"
Rise:
Transit:
Set:
6h 58m 4s
14h 38m 15s
22h 18m 27s
Names and Catalog Numbers
Tycho catalog number:
PPM number:
Henry Draper number:
DM number:
TYC 2126-1196-1
PPM 108364
HD 177830
BD +25 3719
Star Atlas Chart Numbers
Herald-Bobroff Astroatlas, Chart C-25
Millennium Star Atlas, Charts 1197-1198 (Vol III)
Sky Atlas 2000.0, Chart 8
Uranometria 2000 Chart 161, Vol 1
Tycho Catalog Data
Tycho Catalogue (ESA SP-1200, 1997).
Tycho Identifier/Proximity Flag
Catalog number: TYC 2126-1196-1
Proximity flag: None
Descriptor
V magnitude: 7.17
Source of V magnitude: Johnson UBV photometric system.
Astrometric Data
Equatorial coordinates (epoch J2000.0, ICRS)
RA:
Dec:
19h 05m 20.7729s
+25° 55' 14.400"
Standard errors of the equatorial coordinates (epoch J1991.25)
RA:
Dec:
0.0022 arcsec
0.0027 arcsec
Astrometric reference flag: This is a recommended astrometric reference star, having good
Tycho astrometric quality, and not recognised as double.
Trigonometric parallax: 0.01640 arcsec
Standard error of the parallax: 0.00360 arcsec
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Proper motion components (epoch J1991.25, ICRS)
(Data is from the ACT catalog)
RA:
Dec:
-0.04620 arcsec/yr
-0.04920 arcsec/yr
Standard errors of the proper motion components
RA:
Dec:
0.00086 arcsec
0.00086 arcsec
Number of accepted data points: 282
Goodness-of-fit parameter, F2: -0.26
Hipparcos catalog number: 93746
Astrometric quality flag: 1 (very high).
Signal-to-noise ratio of the star image, Fs: 17.1
Source of astrometric data: Standard data processing.
Photometric Data
Mean Bt magnitude: 8.575
Standard error: 0.008
Mean Vt magnitude: 7.291
Standard error: 0.005
Source of photometric data: The Bt,Vt data are de-censored mean values derived from the decensoring analysis from the (normal) photometric processing for faint stars.
Johnson B-V colour index: 1.090
Standard error: 0.007
Number of transits used in mean photometry: 221
Vt scatter, s: 0.072 mag
Vt magnitude at maximum luminosity: 7.23
Vt magnitude at minimum luminosity: 7.36
Previously known or suspected variability: None.
Variability of the Tycho measurements: None.
Unresolved duplicity status: No investigation for duplicity was carried out on the Tycho data.
Cross-identification and Notes
PPM identifier: PPM 108364
HD identifier: HD 177830
DM identifier: BD +25 3719
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