Download 55 cancri

55 cancri
Summary
Visual magnitude: 5.95
Distance: 39.8 +/- 1.4 light years
Luminosity: 0.50 +/- 0.036 x Sun's luminosity
Position information for 01 ene 2000 0:00:00
(Julian day number 2451544.41667)
Apparent RA (epoch of date): 08h 52m 35.97s
Apparent Dec (epoch of date): +28° 19' 43.8"
Constellation: Cancer
Altitude:
Azimuth:
+34° 45' 2"
80° 19' 24"
Rise:
Transit:
Set:
20h 31m 26s
4h 27m 13s
12h 19m 4s
Names and Catalog Numbers
Bayer letter:
 1 Cancri
Flamsteed number:
Tycho catalog number:
PPM number:
Henry Draper number:
DM number:
55 Cancri
TYC 1949-2012-1
PPM 99117
HD 75732
BD +28 1660
Star Atlas Chart Numbers
Herald-Bobroff Astroatlas, Chart C-32
Millennium Star Atlas, Charts 663-664 (Vol II)
Sky Atlas 2000.0, Chart 6
Uranometria 2000 Chart 102, Vol 1
Tycho Catalog Data
Tycho Catalogue (ESA SP-1200, 1997).
Tycho Identifier/Proximity Flag
Catalog number: TYC 1949-2012-1
Proximity flag: None
Descriptor
V magnitude: 5.95
Source of V magnitude: Johnson UBV photometric system.
Astrometric Data
Equatorial coordinates (epoch J2000.0, ICRS)
RA:
Dec:
08h 52m 35.8107s
+28° 19' 50.974"
Standard errors of the equatorial coordinates (epoch J1991.25)
RA:
Dec:
0.0027 arcsec
0.0018 arcsec
Astrometric reference flag: This is a dubious astrometric reference star in the context of the
Tycho catalog.
Trigonometric parallax: 0.08200 arcsec
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Standard error of the parallax: 0.00300 arcsec
Proper motion components (epoch J1991.25, ICRS)
(Data is from the ACT catalog)
RA:
Dec:
-0.55230 arcsec/yr
-0.23140 arcsec/yr
Standard errors of the proper motion components
RA:
Dec:
0.00779 arcsec
0.00385 arcsec
Number of accepted data points: 94
Goodness-of-fit parameter, F2: -2.08
Hipparcos catalog number: 43587
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: 7.057
Standard error: 0.006
Mean Vt magnitude: 6.043
Standard error: 0.005
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: 0.877
Standard error: 0.006
Number of transits used in mean photometry: 97
Vt scatter, s: 0.039 mag
Vt magnitude at maximum luminosity: 6.00
Vt magnitude at minimum luminosity: 6.08
Previously known or suspected variability: None.
Variability of the Tycho measurements: None.
Unresolved duplicity status: An investigation was carried out on the Tycho data, but no
indication of duplicity was found.
Cross-identification and Notes
PPM identifier: PPM 99117
HD identifier: HD 75732
DM identifier: BD +28 1660
Notes on dubious entries: Dubious Tycho proper motion: a Tycho proper motion component
deviates more than 4 sigma from the PPM proper motion. Note that for most Tycho stars,
however, SkyMap Pro displays ACT proper motion components; these have much greater
accuracy than the original Tycho proper motion data.
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