Observe
1Properties
Magnitude
12.2
Angular Size
2.4 arcmin
pF, cS, iR, psmbM, *10 np 3'
Querying SIMBAD database...
Position & Identifiers
2How easy to spot?
Sign in
and configure your equipment and default location to see a personalized row.
| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Hard | V. hard+ | V. hard |
| 150 mm Newton 150mm Newt. | Medium | Hard+ | Hard |
| Celestron C8 (203 mm SCT) C8 203mm | Medium | Medium | Hard+ |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Medium
on Seestar S50
3Visibility
Set a location in User Settings to see visibility data.
Best season
Feb – Apr
(peak: Mar)
4
Eyepiece View
5
Best Magnification
Explore
6
Surface Brightness
7
Size Comparator
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
NGC 3640
Elliptical galaxy
Galaxy
mag 10.3
1.6°
Leo
NGC 3521
Bright spiral galaxy
Galaxy
mag 8.9
5.4°
Leo
56 Leo
Semi-regular variable, range 5.7–6.0
Variable Star
mag 5.81
5.6°
Leo
NGC 3423
Bright spiral galaxy
Galaxy
mag 11.2
6.7°
Sextans
NGC 3593
Bright spiral galaxy
Galaxy
mag 11.0
8.3°
Leo
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
William Parsons
Built the Leviathan of Parsonstown; first to resolve spiral structure of nebulae
Biography
Galaxies and the Interstellar Medium
The Hubble tuning fork, Tully-Fisher distances, metallicity, Wolf-Rayet stars, HII regions, interstellar dust, the 21-cm hydrogen line, and the Sunyaev-Zel'dovich effect — the working toolkit astronomers use to read galaxies and the stuff between their stars.
Article
Leo
Mythology, bright stars, and deep-sky highlights.
Constellation
