Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pictor |
Right ascension | 04h 37m 15.81476s [1] |
Declination | −47° 15′ 08.6242″ [1] |
Apparent magnitude (V) | 20.98±0.09 [2] |
Characteristics | |
Spectral type | Pulsar |
Astrometry | |
Proper motion (μ) |
RA: 121.453
mas/
yr Dec.: 71.457 mas/ yr |
Distance | 509.8
ly (156.3 [3] pc) |
Details | |
Mass | 1.44 [4] M☉ |
Other designations | |
PSR B0435−47,
1RXS J043714.5−471503 | |
Database references | |
SIMBAD | data |
PSR J0437−4715 is a pulsar. Discovered in the Parkes 70 cm survey, [5] it remains the closest and brightest millisecond pulsar (MSP) known. The pulsar rotates about its axis 173.7 times per second and therefore completes a rotation every 5.75 milliseconds. It emits a searchlight-like radio beam that sweeps past the Earth each time it rotates. Currently the most precisely located object outside of the Solar System, PSR J0437-4715 is 156.3 parsecs or 509.8 light-years distant. [3]
This pulsar is distinguished by being the most stable natural clock known and is debatably more stable than man-made atomic clocks. [6] [7] Its stability is about one part in 1015. Two other pulsars, PSR B1855+09 and PSR B1937+21 are known to be comparable in stability to atomic clocks, or about 3 parts in 1014.
PSR J0437−4715 is the first MSP to have its X-ray emission detected and studied in detail. [8] It is also the first of only two pulsars to have the full three-dimensional orientation of its orbit determined. [9]
Optical observations indicate that the binary companion of PSR J0437-4715 is most likely a low-mass helium white dwarf. [2] The pulsar is about 1.4 solar mass ( M☉) [4] and the companion is about 0.25 M☉. [1] The pair revolve around each other every 5.75 days in nearly perfect circular orbits. [10]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pictor |
Right ascension | 04h 37m 15.81476s [1] |
Declination | −47° 15′ 08.6242″ [1] |
Apparent magnitude (V) | 20.98±0.09 [2] |
Characteristics | |
Spectral type | Pulsar |
Astrometry | |
Proper motion (μ) |
RA: 121.453
mas/
yr Dec.: 71.457 mas/ yr |
Distance | 509.8
ly (156.3 [3] pc) |
Details | |
Mass | 1.44 [4] M☉ |
Other designations | |
PSR B0435−47,
1RXS J043714.5−471503 | |
Database references | |
SIMBAD | data |
PSR J0437−4715 is a pulsar. Discovered in the Parkes 70 cm survey, [5] it remains the closest and brightest millisecond pulsar (MSP) known. The pulsar rotates about its axis 173.7 times per second and therefore completes a rotation every 5.75 milliseconds. It emits a searchlight-like radio beam that sweeps past the Earth each time it rotates. Currently the most precisely located object outside of the Solar System, PSR J0437-4715 is 156.3 parsecs or 509.8 light-years distant. [3]
This pulsar is distinguished by being the most stable natural clock known and is debatably more stable than man-made atomic clocks. [6] [7] Its stability is about one part in 1015. Two other pulsars, PSR B1855+09 and PSR B1937+21 are known to be comparable in stability to atomic clocks, or about 3 parts in 1014.
PSR J0437−4715 is the first MSP to have its X-ray emission detected and studied in detail. [8] It is also the first of only two pulsars to have the full three-dimensional orientation of its orbit determined. [9]
Optical observations indicate that the binary companion of PSR J0437-4715 is most likely a low-mass helium white dwarf. [2] The pulsar is about 1.4 solar mass ( M☉) [4] and the companion is about 0.25 M☉. [1] The pair revolve around each other every 5.75 days in nearly perfect circular orbits. [10]