Acquiring mission data

XTE J1720-318 | Black Holes | Apex Andromeda | Apex Andromeda

Strong CandidateStellar-Mass Binary

Unified black-hole record

XTE J1720-318

Strong black-hole candidate

Also known as V1228 Sco · Nova Sco 2003 · [KRL2007b] 234 · INTEGRAL1 51 · INTREF 772 · V* V1228 Sco

MassNot reported by source catalogs

Distance21.2K ly

HostNot reported by source catalogs

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

Catalog record

Identity and classification

ID: vizier-blackcat:J/ApJS/222/15/table12:33
Canonical name: XTE J1720-318
Alternate names: V1228 Sco · Nova Sco 2003 · [KRL2007b] 234 · INTEGRAL1 51 · INTREF 772 · V* V1228 Sco
Black-hole type: Stellar-Mass Binary
Status: Strong Candidate
Population: Catalog
Confidence: Strong black-hole candidate
Host galaxy: Not reported by source catalogs

Position

Coordinates and distance

Right ascension (RA): 259.99579167°
Declination (Dec): -31.75030833°
Galactic longitude (l): 354.6237°
Galactic latitude (b): 3.1013°
Distance: 21.2K light-years
Distance error: 11.415K light-years
Redshift: Not reported by source catalogs

Physical profile

Mass, spin, and system

Mass: Not reported by source catalogs
Mass error, lower: Not reported by source catalogs
Mass error, upper: Not reported by source catalogs
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: X-ray binary classification
Discovery year: 2003
Discovery observatory: Rx
X-ray properties: WATCHDOG source type: BHC,T,R,J?
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: 2026-09-11T22:32:44.775Z
Source record: Open provider record ↗

Merged source records

VizieR J/ApJS/222/15 (WATCHDOG/BlackCAT)2016ApJS..222...15T
SIMBAD black-hole object typesSIMBAD object type BH/BH?