Star profile
24 Ophiuchi
What is 24 Ophiuchi
24 Ophiuchi is a white star about three hundred and four light-years away, within the vast Ophiuchus —the serpent-bearer the modern zodiac almost claims as its thirteenth sign. Its A type signals a hot atmosphere and a clean glow, befitting stars still in full stable life. Few know that Ophiuchus witnessed, in 1604, the last supernova seen by the naked eye in our galaxy.
Where it is and when to see it
24 Ophiuchi lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is June, when it culminates around midnight.
- From London it culminates about 15° above the horizon.
- From New York it culminates about 26° above the horizon.
- From Sydney it culminates about 79° above the horizon.
It can be seen from anywhere south of 67° N.
It ranks no. 60 in brightness among the 88 stars of Ophiuchus in our catalogue. To find it, start from Rasalhague, the brightest: it lies about 37° away (a fist at arm's length covers about 10°).
The light you see today left it about 300 years ago.
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Astronomical data for 24 Ophiuchi
- Constellation
- Ophiuchus
- Apparent magnitude
- 5.57
- Distance
- 303.7 light years
- Coordinates (J2000)
- RA 254.200° · Dec -23.150°
- Catalogue
- HIP 82925 · HD 152849
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Other stars in Ophiuchus
Ophiuchus has 88 stars in Stelvia's catalogue. Here are a few of them.
- RasalhagueAlpha Ophiuchi2.08
- SabikEta Ophiuchi2.43
- Zeta Ophiuchi2.54
- HIP 890655.50
- 21 Ophiuchi5.51
- HIP 817545.55
- HIP 857495.57
- HIP 859225.61