SS 433

SS 433
	; SS 433 at the centre of supernova remnant W50; Credit: NRAO/AUI/NSF, K. Golap, M. Goss; NASA’s Wide Field Survey Explorer (WISE)
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Aquila
Right ascension	19h 11m 49.56s
Declination	+04° 58′ 57.8″
Apparent magnitude (V)	13.0 - 17.3
Characteristics
Spectral type	A7Ib
Variable type	Eclipsing binary
Astrometry
Proper motion (μ)	RA: −3.027 mas/yr ; Dec.: −4.777 mas/yr
Parallax (π)	0.1182±0.0233 mas
Distance	18,000±700 ly ; (5,500±200 pc)
Orbit
Period (P)	13.082 d
Eccentricity (e)	0.05 ± 0.01
Inclination (i)	79°
Other designations
	V1343 Aql, GAL 039.7-02.0, 2MASS J19114957+0458578, USNO 659, 1A 1909+04, 87GB 190920.8+045332, NEK 40.1-02.1, 3A 1909+048, GPS 1909+049, RGB J1911+049, BWE 1909+0453, GRS 039.60 -01.80, RX J1911.7+0459, 4C 04.66, 1H 1908+047, 1RXS J191149.7+045857, 2E 1909.3+0453, HBHA 204-02, AAVSO 1906+04, 2E 4204, INTEGRAL1 110, TXS 1909+048, 1ES 1909+04.8, INTREF 969, 4U 1908+05.
Database references
SIMBAD	data

SS 433 is a microquasar or eclipsing X-ray binary system, consisting of a stellar-mass black hole accreting matter from an A-type companion star.^[5]^[6] SS 433 is the first discovered microquasar.^[7] It is at the centre of the supernova remnant W50.

SS 433's designation comes from the initials of two astronomers at Case Western Reserve University: Nicholas Sanduleak and Charles Bruce Stephenson. It was the 433rd entry in their 1977 catalog of stars with strong emission lines.^[7] Its emission lines were studied by Mordehai Milgrom in 1979.^[8]

^ ^a ^b ^c ^d ^e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
^ Blundell, Katherine M.; Bowler, Michael G. (2004). "Symmetry in the Changing Jets of SS 433 and Its True Distance from Us". The Astrophysical Journal. 616 (2): L159 – L162. arXiv:astro-ph/0410456. Bibcode:2004ApJ...616L.159B. doi:10.1086/426542. ISSN 0004-637X. S2CID 11213274.
^ Jeffrey, Robert (2016). The remarkable outflows from the galactic microquasar SS433. ora.ox.ac.uk (DPhil thesis). University of Oxford. EThOS uk.bl.ethos.730205.
^ ^a ^b Cherepashchuk, A. M.; Belinski, A. A.; Dodin, A. V.; Postnov, K. A. (2021). "Discovery of orbital eccentricity and evidence for orbital period increase of SS433". Monthly Notices of the Royal Astronomical Society: Letters. 507 (1): L19 – L23. arXiv:2107.09005. Bibcode:2021MNRAS.507L..19C. doi:10.1093/mnrasl/slab083.
^ Hillwig, T. C.; Gies, D. R.; Huang, W.; McSwain, M. V.; Stark, M. A.; Van Der Meer, A.; Kaper, L. (2004). "Identification of the Mass Donor Star's Spectrum in SS 433". The Astrophysical Journal. 615 (1): 422–431. arXiv:astro-ph/0403634. Bibcode:2004ApJ...615..422H. doi:10.1086/423927. S2CID 17930915.
^ ^a ^b SS 433, David Darling, entry in The Internet Encyclopedia of Science, accessed on line September 14, 2007.
^ Milgrom, Mordehai (October 1979). "Thomson scattered lines in the spectrum of SS 433 - A powerful tool for studying the system". Astronomy and Astrophysics. 78 (3): L17 – L20. Bibcode:1979A&A....78L..17M.

[dr3-1] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[gcvs-2] Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.

[asym-3] Blundell, Katherine M.; Bowler, Michael G. (2004). "Symmetry in the Changing Jets of SS 433 and Its True Distance from Us". The Astrophysical Journal. 616 (2): L159 – L162. arXiv:astro-ph/0410456. Bibcode:2004ApJ...616L.159B. doi:10.1086/426542. ISSN 0004-637X. S2CID 11213274.

[jeffphd-4] Jeffrey, Robert (2016). The remarkable outflows from the galactic microquasar SS433. ora.ox.ac.uk (DPhil thesis). University of Oxford. EThOS uk.bl.ethos.730205.

[Cherepashchuk-5] Cherepashchuk, A. M.; Belinski, A. A.; Dodin, A. V.; Postnov, K. A. (2021). "Discovery of orbital eccentricity and evidence for orbital period increase of SS433". Monthly Notices of the Royal Astronomical Society: Letters. 507 (1): L19 – L23. arXiv:2107.09005. Bibcode:2021MNRAS.507L..19C. doi:10.1093/mnrasl/slab083.

[6] Hillwig, T. C.; Gies, D. R.; Huang, W.; McSwain, M. V.; Stark, M. A.; Van Der Meer, A.; Kaper, L. (2004). "Identification of the Mass Donor Star's Spectrum in SS 433". The Astrophysical Journal. 615 (1): 422–431. arXiv:astro-ph/0403634. Bibcode:2004ApJ...615..422H. doi:10.1086/423927. S2CID 17930915.

[darling-7] SS 433, David Darling, entry in The Internet Encyclopedia of Science, accessed on line September 14, 2007.

[8] Milgrom, Mordehai (October 1979). "Thomson scattered lines in the spectrum of SS 433 - A powerful tool for studying the system". Astronomy and Astrophysics. 78 (3): L17 – L20. Bibcode:1979A&A....78L..17M.

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
SS 433 at the centre of supernova remnant W50 Credit: NRAO/AUI/NSF, K. Golap, M. Goss; NASA’s Wide Field Survey Explorer (WISE)
Constellation	Aquila
Right ascension	19^h 11^m 49.56^s^[1]
Declination	+04° 58′ 57.8″^[1]
Apparent magnitude (V)	13.0 - 17.3^[2]
Characteristics
Spectral type	A7Ib
Variable type	Eclipsing binary^[2]
Astrometry

Proper motion (μ)	RA: −3.027^[1] mas/yr Dec.: −4.777^[1] mas/yr
Parallax (π)	0.1182±0.0233 mas^[1]
Distance	18,000±700 ly (5,500±200^[3]^[4] pc)

Orbit^[5]
Period (P)	13.082 d
Eccentricity (e)	0.05 ± 0.01
Inclination (i)	79°
Other designations
V1343 Aql, GAL 039.7-02.0, 2MASS J19114957+0458578, USNO 659, 1A 1909+04, 87GB 190920.8+045332, NEK 40.1-02.1, 3A 1909+048, GPS 1909+049, RGB J1911+049, BWE 1909+0453, GRS 039.60 -01.80, RX J1911.7+0459, 4C 04.66, 1H 1908+047, 1RXS J191149.7+045857, 2E 1909.3+0453, HBHA 204-02, AAVSO 1906+04, 2E 4204, INTEGRAL1 110, TXS 1909+048, 1ES 1909+04.8, INTREF 969, 4U 1908+05.
Database references
SIMBAD	data