Catalogue record

HR 7001

3Alp Lyr

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A bounded starter sample: 50 bright-star records from HEASARC BSC5P, including 23 records with identified double-star components and historical separations, plus 108 OpenNGC deep-sky records associated with Messier numbers.

These are static catalogue measurements, not current sky positions or a complete census. Double-star records may describe the same pair; a pair is not necessarily a gravitationally bound binary. Separation dates and companion position angles are not available.

Missing measurements are unknown, not zero. Sizes can come from different wavelength bands and do not guarantee an object’s visible extent. No observability or equipment-resolution prediction is made here.

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Stable source identifier: bsc5p:hr7001
Source object type: star
Catalogue right ascension: 279.2346 degrees
Catalogue declination: 38.7836 degrees
Recorded magnitude: 0.03 · V (BSC5P; retain code/uncertainty flags)
Uncertainty flag: None reported; source code: None reported
Catalogue major / minor axes: Not reported / Not reported
Components: AB
Historical component separation: 62.8 arcsec
Separation measurement epoch: Not reported
Companion position angle: Not reported

Coordinate interpretation

Verified coordinate frame: FK5
Frame equinox: J2000.0
Catalogue reference epoch: Julian year 2000.0
Individual observation epoch: Not reported
RA proper motion, including cosine of declination: 0.202 arcsec/year
Declination proper motion: 0.286 arcsec/year

The reference epoch describes when the catalogue position is expressed. It does not establish when individual observations were taken. Equinox describes the orientation of the coordinate axes.

Angular proper motion is available for a bounded calculation, but has not been applied here. No distance, radial velocity, perspective acceleration or companion orbit is inferred.

This page shows unchanged catalogue coordinates. It does not calculate current sky positions or observability.

Source and reuse: bsc5p

Hoffleit and Warren (1991), Bright Star Catalog, 5th revised preliminary edition; NASA/GSFC HEASARC

Original source / pinned release · NASA government-works; HEASARC free-use policy

Credit Hoffleit and Warren and NASA/GSFC HEASARC when reusing these records. Retain the source flags and historical measurement limitations.

Selection: Vmag <= 2.0, excluding 14 documented nonstellar HR identifiers
Retrieved: 2026-10-01T21:40:09.869946+00:00
Reviewed subset SHA256: 7fe926d80b535f9422ca81f8f3fee1d6422de29adaecfbd2f14b1a93fe5134b9

Original file hashes

bsc5p.tdat: e2b2f8e9d615426f9478f88061235976143d49d8b25c6c15df3f3661c7095b53

Coordinate-frame evidence

CDS VizieR · V/50/catalog

Exact source identifiers matched: 50. Evidence retrieved: 2026-10-01.

Pinned response SHA256: a3f83273ccaecf913a0d8e077413062c20ce1fc01ce890c80615a9572d5f1be9

Original source fields and flags

Original strings preserve missing values, photometric flags and per-field source codes. Blank means no value was supplied. No proper motion or companion position is calculated here.

ads: 11510
ads_comp: Not supplied
alt_name: 3Alp Lyr
bii: 19.2374
bv_color: 0
bv_uncert: Not supplied
cdec: +384701
cdec_1950: +384424
class: 2305
cra: 183656.3
cra_1950: 183515.5
dec: 38.7836
dec_1900: 38.68333333406
dec_1950: 38.7399
dm_cat: BD
dm_num: +38 3238
fk5: 699
glat: 19.24
glon: 67.44
hd: 172167
hr: 7001
ir_flag: I
lii: 67.448
m_cnt: 5
m_id: AB
m_mdiff: 10.4
m_sep: 62.8
multiple: Not supplied
name: HR 7001
note: *
par_code: Not supplied
parallax: 0.123
pmdec: 0.286
pmra: 0.202
ra: 279.2346
ra_1900: 278.3879166603
ra_1950: 278.8145
radvel: -14
radvel_comm: V
ri_code: Not supplied
ri_color: -0.03
rotvel: 15
rotvel_comm: Not supplied
rotvel_uncert: Not supplied
sao: 67174
spect_code: Not supplied
spect_type: A0Va
ub_color: -0.01
ub_uncert: Not supplied
var_id: Alp Lyr
vmag: 0.03
vmag_code: Not supplied
vmag_uncert: Not supplied