M99
spiral galaxy · Coma Berenices · 9.8ᵐ
A Messier catalogue object — spiral galaxy in Coma Berenices.
Notable facts
About 1/6 the apparent diameter of the Moon.
In brief
Which constellation is M99 in?
M99 lies in Coma Berenices.
Is M99 visible to the naked eye?
9.8ᵐ — a telescope is needed.
When is the best time to observe M99?
Best observed in March.
Data
- RA / Dec (J2000)
- 12h 19m · +14° 25′
- Type
- spiral galaxy
- Constellation
- Coma Berenices
- How to observe
- 9.8ᵐ — a telescope is needed
- Angular size
- 5×5′
- Designation
- M99 · NGC 4254
Observing tip
Get away from city light pollution — it washes out the faint glow of galaxies first.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | 44° | 60° |
| +55° | 49° | 64° |
| +45° | 59° | 69° |
| +30° | 74° | 73° |
| 0° | 76° | 76° |
| −35° | 41° | 72° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 04:33 |
| February | 02:26 |
| March | 00:41 |
| April | 22:47 |
| May | 20:53 |
| June | 18:47 |
| July | 16:43 |
| August | 14:42 |
| September | 12:49 |
| October | 11:00 |
| November | 08:59 |
| December | 06:51 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.