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GRS 1009-45 | Black Holes | Apex Andromeda | Apex Andromeda

Black Holes/GRS 1009-45

ConfirmedStellar-Mass Binary

Unified black-hole record

GRS 1009-45

Dynamically confirmed black hole

Also known as MM Vel · Nova Vel 1993

Mass4.4 M☉

Distance12.394K 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/table12:6
Canonical name: GRS 1009-45
Alternate names: MM Vel · Nova Vel 1993
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): 153.39833333°
Declination (Dec): -45.07646667°
Galactic longitude (l): 275.8773°
Galactic latitude (b): 9.3439°
Distance: 12.394K light-years
Distance error: 978.469 light-years
Redshift: Not reported by source catalogs

Physical profile

Mass, spin, and system

Mass: 4.4 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: N. Vel 93
Companion type: K7-M0V
Orbital period: 0.28520416666666665 days
Inclination: 37°

Evidence

Detection and discovery

Detection method: Dynamical mass measurement in an X-ray binary
Discovery year: 1993
Discovery observatory: G,CG
X-ray properties: WATCHDOG source type: BH,T
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 ↗

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