M 98 Deep sky · Galaxy in Coma Berenices · M 98 · NGC 4192
M 98
A long spiral seen nearly edge-on in Coma Berenices — one of the few galaxies in the sky that is moving towards us.
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- Type
- Galaxy
- Designations
- M 98 · NGC 4192
- Constellation
- Coma Berenices
- Apparent magnitude
- 10.8
- Apparent size
- 11′ × 3′
- Position (J2000)
- RA 12h 14m · Dec +14° 54′
The full Moon, about 31′ across, is 2.8 times as wide. The Sun comes no nearer to it than 15°, around mid September, so it is never lost in the Sun’s glare, which reaches about 15° out.
When to see it
On the night of Tue 23 Mar 2027, when it is highest around midnight, on each city’s own clock:
| From | Rises | Highest | Sets |
|---|---|---|---|
| London GMT | 16:54 | 00:10 · 53° | 07:26 |
| New York EDT | 18:14 | 01:05 · 64° | 07:56 |
| Singapore GMT+8 | 19:15 | 01:16 · 77° | 07:16 |
| Sydney GMT+11 | 19:48 | 01:06 · 41° | 06:25 |
Common questions
- Can I see it from 50° north?
- Yes. It rises and sets, and at its highest it stands 55° up in the south.
- Can I see it from 35° south?
- Yes. It rises and sets, and at its highest it stands 40° up in the north.
- When is the best time of year to see it?
- Around late March, when it stands opposite the Sun and is highest at midnight. It comes round about two hours earlier each month, so by late June it is highest in the early evening, and in late December not until the hours before dawn.
- How bright is it?
- Magnitude 10.8 in total, but that light is spread over 11′ × 3′ of sky: on average 23.1 magnitudes per square arcsecond. Against a dark country sky that average stands out; a city’s glow drowns all but its brightest parts.
- Naked eye, binoculars or telescope?
- Binoculars. At magnitude 10.8 it is past the eye, but a 50 mm pair under a dark sky reaches about magnitude 11.0.
Look for
It sits at the western edge of the Virgo galaxy field, east of Denebola and close to M 99: a thin streak, brighter in the middle.
Science
Its own motion through the Virgo Cluster is fast enough to overcome the expansion of the universe, so its light reaches us shifted to the blue.
Look for
From 50° north it climbs to 55°; from 35° north it climbs to 70°; from the equator it climbs to 75°; from 35° south it climbs to 40°.
Look for
Magnitude 10.8 against the faintest star each can show: the eye under a city sky, 4.5 (6.3 short); the eye under a dark country sky, 7.0 (3.8 short); 50 mm binoculars under that dark sky, 11.0 (0.2 to spare); a 100 mm telescope there, 12.5 (1.7 to spare). Those limits are for a point of light; its light is spread over its whole size, so it needs some of that margin in hand. Through 7×50 binoculars, whose field is about 7.1° across, it spans 3% of the field’s width; through a 100 mm telescope at 50×, a field about 1° across, it spans 18% of the field’s width.