40 Eridani A
star in the constellation Eridanus
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Summary
40 Eridani An is an eruptive variable star[1]. It is known by 30 alternative names across languages and contexts.[2]
Key Facts
- Instance of: near-infrared source[3], ultraviolet source[4], double star[5]
- Constellation: Eridanus[6]
- Spectral class: K2V[7]
- Part of: Omicron2 Eridani[8]
- Commons category: 40 Eridani[9]
- Companion of: 40 Eridani B[10], 40 Eridani C[11]
- Catalog code: 2MASS J04151651-0739068[12], HD 26965[13], HIP 19849[14], HR 1325[15], SAO 131063[16], GJ 166 A[17], ADS 3093 A[18], 1RXS J041521.5-073843[19], 2EUVE J0415-07.6[20], CCDM J04153-0739A[21], EUVE J0415-07.6[22], GC 5138[23], GCRV 2440[24], HIC 19849[25]
- Type of variable star: rotating variable star[26]
- Orbital eccentricity: 0.04[27]
- Apparent magnitude: 5.69[28], 5.25[29], 4.43[30], 3.74[31], 3.29[32], 2.93[33], 2.48[34], 2.41[35], 4.179894[36]
- Present in work: Star Trek: Cryptic – A Puzzles and Pathways Adventure[37]
- M sin i: 0.02665 Jupiter mass[38]
- Luminosity: 0.4572952 solar luminosity[39]
- Radius: 0.812 solar radius[40]
- Orbital period: 42.378 day[41]
- Parallax: 199.608 milliarcsecond[42]
- Radial velocity: -42.269 kilometre per second[43]
- Metallicity: -0.198[44]
- Semi-major axis of an orbit: 0.215 astronomical unit[45]
- Distance from Earth: 5.0098 parsec[46]
- Stellar rotational velocity: 0.369 kilometre per second[47]
- Right ascension: 63.81799841247707 degree[48]