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GRO J0422+32 | Black Holes | Apex Andromeda | Apex Andromeda

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Black Holes/GRO J0422+32

ConfirmedStellar-Mass Binary

Unified black-hole record

GRO J0422+32

Dynamically confirmed black hole

Also known as V518 Per · Nova Per 1992

Mass2 M☉

Distance8.121K ly

HostNot reported by source catalogs

Drag to orbitScroll to zoomEmbedded animation playing

3D model “Blackhole” by rubykamen, licensed under CC BY 4.0.

Catalog record

Identity and classification

ID: vizier-blackcat:J/ApJS/222/15/table12:2
Canonical name: GRO J0422+32
Alternate names: V518 Per · Nova Per 1992
Black-hole type: Stellar-Mass Binary
Status: Confirmed
Population: Catalog
Confidence: Dynamically confirmed black hole
Host galaxy: Not reported by source catalogs

Position

Coordinates and distance

Right ascension (RA): 65.42829167°
Declination (Dec): 32.90752778°
Galactic longitude (l): 165.879°
Galactic latitude (b): -11.9108°
Distance: 8.121K light-years
Distance error: 978.469 light-years
Redshift: Not reported by source catalogs

Physical profile

Mass, spin, and system

Mass: 2 solar masses
Mass error, lower: Not reported by source catalogs
Mass error, upper: Not reported by source catalogs
Spin: Not reported by source catalogs
Companion: (V518 Per)
Companion type: M4-5V
Orbital period: 0.21225770833333335 days
Inclination: 10°

Evidence

Detection and discovery

Detection method: Dynamical mass measurement in an X-ray binary
Discovery year: 1992
Discovery observatory: CG
X-ray properties: WATCHDOG source type: BH,T,R
Radio properties: Not reported by source catalogs
Gravitational-wave event: Not reported by source catalogs

Provenance

Sources and refresh state

Source catalog: VizieR J/ApJS/222/15 (WATCHDOG/BlackCAT)
Source reference: 2016ApJS..222...15T
Last updated: 2026-08-31T01:34:41.049Z
Source record: Open provider record ↗