4U 1957+115

Black-hole candidate

Also known as V1408 Aql · Gaia DR3 4303869526257075968 · SRGA J195923.6+114224 · 1A 1956+11 · 1H 1956+115 · 1M 1956+116 · 1XRS 19570+115 · 2S 1957+115 · 3A 1957+115 · 3U 1956+11 · 4U 1957+11 · H 1957+11 · INTREF 1003 · [BM83] X1957+115 · [FS2003] 1053 · TIC 1909750039 · 1RXS J195924.2+114235 · PBC J1959.2+1143 · SWIFT J1959.3+1143 · Gaia DR2 4303869526257075968 · 2SXPS J195924.1+114231 · V* V1408 Aql

MassNot reported by source catalogs

DistanceNot reported by source catalogs

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/table12:72
Canonical name: 4U 1957+115
Alternate names: V1408 Aql · Gaia DR3 4303869526257075968 · SRGA J195923.6+114224 · 1A 1956+11 · 1H 1956+115 · 1M 1956+116 · 1XRS 19570+115 · 2S 1957+115 · 3A 1957+115 · 3U 1956+11 · 4U 1957+11 · H 1957+11 · INTREF 1003 · [BM83] X1957+115 · [FS2003] 1053 · TIC 1909750039 · 1RXS J195924.2+114235 · PBC J1959.2+1143 · SWIFT J1959.3+1143 · Gaia DR2 4303869526257075968 · 2SXPS J195924.1+114231 · V* V1408 Aql
Black-hole type: Stellar-Mass Binary
Status: Candidate
Population: Catalog
Confidence: Black-hole candidate
Host galaxy: Not reported by source catalogs

Position

Coordinates and distance

Right ascension (RA): 299.850875°
Declination (Dec): 11.709°
Galactic longitude (l): Not reported by source catalogs
Galactic latitude (b): Not reported by source catalogs
Distance: Not reported by source catalogs
Distance error: Not reported by source catalogs
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: 1973
Discovery observatory: U
X-ray properties: WATCHDOG source type: BHC,P,W
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: 2026-09-12T03:20:07.578Z
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?

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