Spectral type of HD182488 (GJ 758, HIP95319)

Lyran Flint

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May 9, 2025, 2:52:21 PMMay 9

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Hello!

The star HD182488 (GJ 758, HIP95319) in the Lyra constellation is classified by Stellarium as K0V spectral type. However a wide variety of sources define the star as G8V.

For example

here

https://exoplanetarchive.ipac.caltech.edu/overview/HD%20182488

or here

https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=mission_exocat

This star was included in the list of stars of ExoCat-1 mission.

In fact it is binary star of G-type with brown dwarf companion.

Why spectral type of this star in Stellarium is K0V? It seems that K0V is wrong data.

Georg Zotti

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May 9, 2025, 2:58:29 PMMay 9

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It depends on what data are presented in the catalog where Stellarium's data came from. If Gaia says K0V, we should do so as well. G8 sounds pretty close to K0, and I expect you can find thousands of objects where some listed data entry in various catalogs list somewhat different data. If you need spectra class according to ExoCat-1, look into that catalog.

Lyran Flint

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May 9, 2025, 7:11:16 PMMay 9

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Thank you.

пятница, 9 мая 2025 г. в 14:58:29 UTC+3, Georg Zotti:

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