Star profile
33 Piscium
Variable starWhat is 33 Piscium
33 Piscium is an inseparable pair. Its primary is a red giant of type K0 IIIb whose chemistry reveals the «first dredge-up», the moment when core ashes rise to the surface. The two orbit each other in 72.93 days with moderate eccentricity; the system —catalogued as BC Piscium— is an RS Canum Venaticorum variable, its light modulated by active starspots. Leah Allen and Adelaide Hobe first detected its radial-velocity swing at Lick Observatory in 1911.
Where it is and when to see it
33 Piscium lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is September, when it culminates around midnight.
- From London it culminates about 33° above the horizon.
- From New York it culminates about 44° above the horizon.
- From Sydney it culminates about 62° above the horizon.
It can be seen from anywhere south of 84° N.
It ranks no. 15 in brightness among the 79 stars of Pisces in our catalogue. To find it, start from Alpherg, the brightest: it lies about 30° away (a fist at arm's length covers about 10°).
The light you see today left it about 130 years ago.
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Astronomical data for 33 Piscium
- Constellation
- Pisces
- Apparent magnitude
- 4.61
- Distance
- 128.8 light years
- Coordinates (J2000)
- RA 1.334° · Dec -5.708°
- Catalogue
- HIP 443 · HD 28
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Other stars in Pisces
Pisces has 79 stars in Stelvia's catalogue. Here are a few of them.
- AlphergEta Piscium3.62
- Gamma Piscium3.70
- AlreschaAlpha Piscium3.82
- FumalsamakahBeta Piscium4.48
- Lambda Piscium4.49
- Tau Piscium4.51
- Xi Piscium4.61
- Chi Piscium4.66