Kapteyn’s Star: Difference between revisions
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Modern name for HD 33793 = GJ 191, a high proper motion M1 subdwarf at d=4pc (V=8.8) in [[Pictor]]. The star was unusual – very blue but M1 type, high pm and very high radial velocity (242 km/s). Two recent exoplanet candidates reported (Anglada-Escude+2014) but both have been rebutted (Bortles+2021). |
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==Etymology and History== |
==Etymology and History== |
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[[File:Eric kapteyn.png|alt=screenshot of table|thumb|Kapteyn's original note of the discovery. ]] |
[[File:Eric kapteyn.png|alt=screenshot of table|thumb|Kapteyn's original note of the discovery. ]] |
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This was 2nd |
This was 2nd-highest proper motion star in 1927 according to Luyten and still is! (8.7”/yr). It was pointed out as highest proper motion (at time) by Kapteyn (1897) “Stern mit grösster bislang bekannter Eigenbewegung” (“Star with largest self-motion known to date”) |
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[[File:Eric Luyten.jpg|alt=screenshot(s) of text|thumb|Luyten giving the name "Kapteyn" to a star]] |
[[File:Eric Luyten.jpg|alt=screenshot(s) of text|thumb|Luyten giving the name "Kapteyn" to a star]] |
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The name appears to be from Luyten (1927) “Note on the Magnitude and Spectrum of Kapteyn's Star”. |
The name appears to be from Luyten (1927) “Note on the Magnitude and Spectrum of Kapteyn's Star”. |
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Latest revision as of 19:54, 18 June 2025
Modern name for HD 33793 = GJ 191, a high proper motion M1 subdwarf at d=4pc (V=8.8) in Pictor. The star was unusual – very blue but M1 type, high pm and very high radial velocity (242 km/s). Two recent exoplanet candidates reported (Anglada-Escude+2014) but both have been rebutted (Bortles+2021).
Etymology and History
This was 2nd-highest proper motion star in 1927 according to Luyten and still is! (8.7”/yr). It was pointed out as highest proper motion (at time) by Kapteyn (1897) “Stern mit grösster bislang bekannter Eigenbewegung” (“Star with largest self-motion known to date”)
The name appears to be from Luyten (1927) “Note on the Magnitude and Spectrum of Kapteyn's Star”.
- "Kapteyn" in Allen (1963; Astrophysical Quantities),
- "Kapteyn's Star" in Rhoads (1971),
- Burnham (1978),
- Fernandez+(1983),
- Sinnott & Perryman Millenium Atlas (1997),
- Cox (2000; Astrophysical Quantities),
- Kaler (2006).
- NASA ADS shows “Kapteyn’s star” listed in 44 abstracts
- Name is already in SIMBAD. Wikipedia
Mythology
IAU Star Name
WGSN discussed the name in 2022 but decided (for the time being) not to name stars after people.
