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به نظرم hip1124 گذينه ي خوبي براي رصد باشه چون يه ستاره ي دور قطبي هستش و همون جور كه ميدونيد هيچ وقت در ايران حد اقل زيره افق نميره اين جرم براي رصد و تحقيق خيلي مناسبه يه سرس اطلاعات از اين جرم برات ميزارم انشالله كه كمك كنه
Information about STT 1-hip1124
Summary
Visual magnitude: 7.17
Spectral type: M4III:
Distance: 935 +/- 137 light years
Luminosity: 90.2 +/- 28.4 x Sun's luminosity
Position information for 25 اوت 2009 06:31:41 ب.ظ
JD: 2455069.27200
Apparent RA: 00h 14m 39.84s
Apparent Dec: +76° 4' 48.7"
Constellation: Cepheus
Altitude: +46° 10' 21"
Azimuth: 18° 28' 53"
Hour angle: 16h 23m 34s
Transit: 2h 10m 48s
Comments: The star is circumpolar and never rises or sets
Names and Catalog Numbers
Tycho catalog number: TYC 4492-2572-1
Hipparcos number: HIP 1124
Henry Draper number: HD 919
DM number: BD +75 0004
PPM number: PPM 4321
SAO number: SAO 4062
WDS designation: STT 1
Star atlas chart numbers
Herald-Bobroff Astroatlas: Chart C-20
Millennium Star Atlas: Charts 13-14 (Vol I)
Sky Atlas 2000.0: Chart 1
Uranometria 2000: Chart 3, Vol 1
Display Hipparcos record
Display Tycho 2 Catalog record
Display WDS Catalog record
Hipparcos Catalog Data
Hipparcos Catalogue (ESA SP-1200, 1997).
Hipparcos Identifier/Proximity Flag
Catalog number: HIP 1124
Proximity flag: None
Descriptor
V magnitude: 7.17
Variability: This star entry is variable at a level of 0.06 to 0.6 mag
Source of V mag: Median Hipparcos magnitude (Hp), combined with information on the colour index (either V-I or Bt-Vt), in combination with the luminosity class.
Main Mission Astrometric Data
Equatorial coordinates (epoch J2000.0, ICRS)
Right Ascension: 00h 14m 02.6093s
Declination: +76° 1' 37.195"
Standard errors of the equatorial coordinates (epoch J1991.25)
RA: 0.00049 arcsec
Dec: 0.00051 arcsec
Parallax information
Trigonometric parallax: 0.00349 arcsec
Standard error of the parallax: 0.00060 arcsec
Proper motion components (epoch J1991.25, ICRS)
RA: +0.10217 arcsec/yr
Dec: +0.00066 arcsec/yr
Standard error in RA: 0.00244 arcsec
Standard error in Dec: 0.00060 arcsec
Miscellaneous astrometric information
Radial velocity: -0.7 km/sec
Percentage of data rejected (F1): 0%
Goodness-of-fit parameter (F2): -0.39
Tycho Photometry and Colour Indices
Bt magnitude: 9.310
Standard error in Bt: 0.015
Vt magnitude: 7.392
Standard error in Vt: 0.007
Johnson B-V colour index: 1.626
Standard error: 0.014
Source of B-V value: Determined from the transformed Tycho Bt-Vt data.
Cousins' V-I colour index: 2.33
Standard error: 0.04
Source of V-I value: Method O
Main Mission Photometry
Median magnitude, Hp: 7.2140
Standard error in median magnitude: 0.0031 mag
Scatter of Hp observations: 0.024 mag
Number of Hp observations: 113
Main Mission Variability
Observed magnitude at maximum and minimum luminosities
Mag at max, Hp: 7.18 (5th percentile)
Mag at min, Hp: 7.25 (95th percentile)
Type of variability: Unsolved variable. Entries are classified as "unsolved" if they do not fall into the other variability categories - this class also includes irregular or semi-irregular variables, and possible variables with amplitudes >=0.03 mag.
Comments: Variability data for this star, such as periods, amplitudes, reference epochs, etc, compiled from the Hipparcos Hp data, along with associated ground-based data, are given in the table of "unsolved" variables in the Hipparcos Variability Annex.
Multiplicity Data
CCDM identifier (J2000.0): 00142+7601
Historical status: The system had been previously identified as double or multiple, as given in Annex 1 of the Hipparcos Input Catalog.
Number of separate catalog entries: 1
Number of components: 1
Reliability of the solution: Suspected non-single, ie possible double or multiple, although no significant or convincing non-single star solution was found.
Miscellaneous
Comment: This is a "survey" star.
Comment: This entry has the following notes in the printed Hipparcos catalog: Photometric (including variability) note (Volume 11).
HD identifier: HD 919
DM identifier: BD +75 0004
V-I colour index: 2.44 mag
Spectral type: M4III:
Source of spectral type: SIMBAD
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Tycho 2 Catalog Data
Tycho 2 Catalogue (E.Hog et al., 2000).
Basic Information
Catalog number: TYC 4492-2572-1
Magnitude: 7.22 (Johnson V mag)
B-V colour index: +1.662 mag
Equatorial coordinates (epoch J2000.0, ICRS)
RA: 00h 14m 02.6086s
Dec: +76° 1' 37.169"
Proper motion components (epoch J2000.0, ICRS)
RA: +0.10146 arcsec/yr
Dec: -0.00250 arcsec/yr
Parallax and radial velocity information
Trigonometric parallax: 0.00349 arcsec
Standard error: 0.00060 arcsec
Radial velocity: -0.7 km/sec
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WDS Catalog Data
Washington Double Star Catalog, 2001. (Brian D. Mason, Gary L. Wycoff, William I. Hartkopf, Geoffrey G. Douglass, and Charles E. Worley, Astrometry Department, U.S. Naval Observatory, 3450 Massachusetts Ave, NW, Washington, DC 20392, USA)
Discoverer's reference: STT 1
Observer: Struve, O.
Number of component records: 1
Component:
RA (J2000.0): 00h 14.1m
Dec (J2000.0): +76° 1'
Number of measurements: 22
Date of first observation: 1875
Position angle: 102°
Separation: 77.1"
Date of last observation: 1993
Position angle: 105°
Separation: 73.3"
Magnitude of first component: 7.17
Magnitude of second component: 7.72
Spectrum: M
Proper motion in RA: 0.038 "/year
Proper motion in dec: -0.007 "/year
Catalog number: BD +75 4
Notes: B is BD+75@5. Proper motion of B +002 -007.
Comment: This pair appears in an appendix list, and is not a part of the discoverer's regular numbering system.
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