Imai
star · Crux · 2.8ᵐ
Blue-white star in Crux.
Notable facts
The light you see today left Imai around the year 1681.
About 19 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Imai in?
Imai lies in Crux.
Is Imai visible to the naked eye?
2.8ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Imai?
Best observed in March.
Data
- RA / Dec (J2000)
- 12h 15m · −58° 45′
- Type
- star
- Constellation
- Crux
- How to observe
- 2.8ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- B2IV — blue-white star
- Absolute magnitude
- -2.3ᵐ
- Luminosity
- ≈731 × the Sun
- Distance
- ~345 light years
- Designation
- HIP 59747
Observing tip
Stars stay points at any magnification: aim your telescope for colour, brightness and companions, not detail.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | never rises | — |
| +55° | never rises | — |
| +45° | never rises | — |
| +30° | 1° | 171° |
| 0° | 31° | 149° |
| −35° | 66° · never sets | — |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 04:30 |
| February | 02:22 |
| March | 00:37 |
| April | 22:44 |
| May | 20:49 |
| June | 18:43 |
| July | 16:39 |
| August | 14:38 |
| September | 12:45 |
| October | 10:56 |
| November | 08:56 |
| December | 06:47 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.