I/68A Positions and Proper Motions in alpha Per cluster (Fresneau, 1980)
Positions and proper motions OF 1981 stars in the vicinity of α Per
Fresneau A.
<Bull. Inform. CDS 18, 81 (1980)>
=1980BICDS..18...81F 1980BICDS..18...81F
ADC_Keywords: Positional data ; Proper motions ; Regional catalog
Description:
A list of positions and proper motions is given for 2027 stars of
magnitude 7.5 to 12.5 within a radius of 3.5 deg. of alpha Persei.
The values are poor for stars fainter than 11.
The present list supersedes the microfiche edition (catalogue I/68/)
which was described in the Bull. Inform. CDS 18, 81 (1980).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
main 79 1981 alpha Per - Catalogue
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Byte-by-byte Description of file: main
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Bytes Format Units Label Explanations
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2- 5 I4 --- Mel20 *[1/1379]? Heckmann's number
8- 14 A7 --- BD *BD (cat. I/122) or CSI
(Catalogue of Stellar Identifications)
16- 17 A2 --- SpType Spectral type (from Heckmann)
19- 21 I3 0.1mag Pmag Photographic Magnitude, in 0.1 magnitude
23- 29 F7.2 yr Epoch Epoch of equatorial coordinates
30- 31 I2 h RAh [3] RA 1950 at Epoch (hours, always 3)
32- 33 I2 min RAm RA 1950 at Epoch (minutes)
34- 39 F6.3 s RAs RA 1950 at Epoch (seconds)
40- 44 F5.3 s e_RAs *?=0.0 Mean error on RA (seconds)
45- 50 F6.2 s/ha pmRA Proper motion mu_alpha in time seconds/century
51- 54 F4.2 s/ha e_pmRA *?=0.0 Mean error on pmRA
55 A1 --- DE- [+] Declination 1950 at Epoch (sign)
56- 57 I2 deg DEd Declination 1950 at Epoch (Degrees)
58- 59 I2 arcmin DEm Declination 1950 at Epoch (Arc minutes)
60- 64 F5.2 arcsec DEs Declination 1950 at Epoch (Arc seconds)
65- 68 F4.2 arcsec e_DEs *?=0.0 Mean error on Dec (arc seconds)
70- 75 F6.2 arcsec/ha pmDE Proper motion mu_delta in arcsec/century
76- 79 F4.2 arcsec/ha e_pmDE *?=0.0 Mean error on pmDE
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Note on Mel20: number as published in Astron. Nachr. 283, 109
(Mitt. Hamburger Sternw. 1956MiHam..10...37H 1956MiHam..10...37H)
if the star belongs to Heckmann's list
Note on BD: this identification is not in BD when a dash (-) follows
the degree zone number.
Note on e_RAs, e_DEs, e_pmRA, e_pmDE:
a zero mean error means that only one observation is available,
and hence the mean error is undefined.
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(End) Alain Fresneau, Francois Ochsenbein [Strasbg Obs.] 26-Mar-1993