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Mrk0817 | Black Holes | Apex Andromeda | Apex Andromeda

Black Holes/Mrk0817

ConfirmedSupermassive

Unified black-hole record

Mrk0817

Direct black-hole mass measurement

Mass37.154M M☉

Distance439.333M ly

HostMrk0817

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-direct:J/ApJ/831/134/table2:23
Canonical name: Mrk0817
Alternate names: None reported
Black-hole type: Supermassive
Status: Confirmed
Population: Catalog
Confidence: Direct black-hole mass measurement
Host galaxy: Mrk0817

Position

Coordinates and distance

Right ascension (RA): 219.09222°
Declination (Dec): 58.79415°
Galactic longitude (l): Not reported by source catalogs
Galactic latitude (b): Not reported by source catalogs
Distance: 439.333M light-years
Distance error: 44.031M light-years
Redshift: Not reported by source catalogs

Physical profile

Mass, spin, and system

Mass: 37.154M solar masses
Mass error, lower: 12.606M solar masses
Mass error, upper: 19.081M solar masses
Spin: Not reported by source catalogs
Companion: Not reported by source catalogs
Companion type: Not reported by source catalogs
Orbital period: Not reported by source catalogs
Inclination: Not reported by source catalogs

Evidence

Detection and discovery

Detection method: Reverberation mapping
Discovery year: Not reported by source catalogs
Discovery observatory: Not reported by source catalogs
X-ray properties: Not reported by source catalogs
Radio properties: Not reported by source catalogs
Gravitational-wave event: Not reported by source catalogs

Provenance

Sources and refresh state

Source catalog: VizieR J/ApJ/831/134
Source reference: 2016ApJ...831..134V
Last updated: 2026-08-31T01:34:41.049Z
Source record: Open provider record ↗