| gravity = 2[15]
| temperature = 3,647[15]
| metal_fe =
| rotational_velocity =
| age_myr =
}}{{Starbox catalog
| names = {{odlist | V=YY Psc | F=30 Psc | BD=−06° 6345 | FK5=1630 | HD=224935 | HIP=154 | HR=9089 | SAO=147042 }}[17]
}}{{Starbox reference
| Simbad = 30+Psc
}}{{Starbox end}}30 Piscium (HIP 154) is a solitary[18] variable star in the zodiac constellation of Pisces. It is visible to the naked eye with an apparent visual magnitude of 4.37.[15] The distance to this star, based upon an annual parallax shift of {{Val|7.8859|ul=mas}}, is around 410 light years. It is moving closer with a heliocentric radial velocity of −12 km/s.[8]This is an aging red giant star with a stellar classification of M3 III,[4] indicating it has exhausted the hydrogen at its core and evolved off the main sequence. It is a candidate long-period variable star[6] and has been given the designation YY Psc.[23] Its varies in brightness between magnitudes 4.31 and 4.41 with no clear period. Possible periods of 23.1, 32.0, 53.6, and 167.8 days have been identified.[24] The star has 74 times the Sun's radius and is radiating 1,148.5[ times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,647 K.[15]]
References
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