Catalog / GJ 644 / van Biesbroeck 8

van Biesbroeck 8

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van Biesbroeck 8

GJ 644 C · GJ 644 · LHS 429 · recons:gj-644:c · Gaia DR3 4339417394313320192

Distance: 6.495 pc · 21.18 ly
Spectral type: M7.0 V (RECONS)
T_eff: 2650 K (spectral type (Pecaut & Mamajek 2013))
Magnitudes: V 16.78 · G 13.813 · BP−RP 4.729
Parallax: 153.966 mas ± 0.057 (Gaia DR3)
Gaia source_id: 4339417394313320192
RECONS name: GJ 644 C

RECONSGaia DR3

Identity & provenance

Stable ID: gaia-dr3:4339417394313320192
Primary name: van Biesbroeck 8 · RECONS common name
Common name: van Biesbroeck 8
RECONS name: GJ 644 C
RECONS system: GJ 644 (rank #95)
Component: C
LHS: 429
Gaia source_id: 4339417394313320192
Gaia designation: Gaia DR3 4339417394313320192
Source catalogs: RECONS+Gaia DR3
Cross-match: matched (8.25″, 1 candidates)
Match note: —

Position

RA: 253.89325 ° · Gaia DR3
Dec: -8.39852 ° · Gaia DR3
Reference epoch: J2016
Galactic l, b: 11.00266 °, 21.08754 °
XYZ (equatorial): -1.783, -6.173, -0.949 pc
Proper motion: -813.04, -870.61 mas/yr · Gaia DR3
Radial velocity: unknown

Distance

Distance: 6.495 pc · 21.18 ly · inverse parallax
Parallax (adopted): 153.9659 mas ± 0.0570 · Gaia DR3
Parallax (RECONS): 154.96 mas
Parallax (Gaia DR3): 153.9659 mas
RECONS vs Gaia: 0.65 %

Photometry & astrophysics

Spectral type: M7.0 V · RECONS
V: 16.78
M_V (RECONS): 17.73
G / BP / RP: 13.813 / 17.053 / 12.324
BP − RP: 4.729
Teff (GSP-Phot): unknown
log g / [M/H]: unknown / unknown
Mass: 0.080 M☉
RUWE: 1.05
Non-single star: 0
Variability flag: NOT_AVAILABLE
Planets: 0

Render parameters (star_params)

Teff: 2650 K · spectral type (Pecaut & Mamajek 2013)
Absolute mag: 14.750 (G)
Bolometric corr.: -1.062
Luminosity: 2.634e-4 L☉
Radius: 0.077 R☉ · Gaia G + parallax + BC_G (Andrae 2018)
Disk radius: 0.4641
Limb darkening u1, u2: 0.6000, 0.2000
Granulation amp / freq: 0.0700 / 17.340
Variability: none
Seed: 791929520

Notes: separation 221"