Errai
star · Cepheus · 3.2ᵐ
Orange star in Cepheus.
Notable facts
About 13 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Errai in?
Errai lies in Cepheus.
Is Errai visible to the naked eye?
3.2ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Errai?
Best observed in September.
Data
- RA / Dec (J2000)
- 23h 39m · +77° 38′
- Type
- star
- Constellation
- Cepheus
- How to observe
- 3.2ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- K1IV — orange star
- Absolute magnitude
- 2.5ᵐ
- Luminosity
- ≈8.9 × the Sun
- Distance
- ~46 light years
- Designation
- HIP 116727
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° | 72° · never sets | — |
| +55° | 67° · never sets | — |
| +45° | 57° · never sets | — |
| +30° | 42° · never sets | — |
| 0° | 12° | 12° |
| −35° | never rises | — |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 15:54 |
| February | 13:47 |
| March | 12:01 |
| April | 10:08 |
| May | 08:14 |
| June | 06:07 |
| July | 04:04 |
| August | 02:03 |
| September | 00:09 |
| October | 22:21 |
| November | 20:20 |
| December | 18:11 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.