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89 Herculis is located just below υ Herculis in Hercules constellation map. |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Hercules |
| Right ascension | 17h 55m 25.1889s[1] |
| Declination | 26° 02′ 59.966″[1] |
| Apparent magnitude (V) | 5.5550[2] |
| Characteristics | |
| Spectral type | F2Ibe[1] |
| U−B color index | +0.27[3] |
| B−V color index | +0.34[3] |
| Astrometry | |
| Radial velocity (Rv) | -28.5[1] km/s |
| Proper motion (μ) | RA: 4.39[1] mas/yr Dec.: 4.97[1] mas/yr |
| Parallax (π) | .76 ± 0.23[2] mas |
| Distance | approx. 4000 ly (approx. 1300 pc) |
| Absolute magnitude (MV) | -5.04 |
| Details | |
| Radius | ~60[4] R☉ |
| Luminosity | 7000-9000 [4] L☉ |
| Temperature | 6300 ± 150[5] K |
| Metallicity | −0.41 Fe/H |
| Rotational velocity (v sin i) | 23[6] km/s |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| NStED | data |
89 Herculis is a sixth-magnitude star in the constellation Hercules. Located about 4,000 light years away,[2] it is among a rare class of stars known as yellow supergiants. Although the star's parallax measurement still has a large error factor of ± 1,300ly making the calculation of other stellar parameters difficult, the star is believed to have a radius of 60 R☉ yielding a bolometric luminosity of 7000-9000 L☉.[4]
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