Mu Leporis — Variable Star in Lepus
About Mu Lep
Description
Mu Leporis is a blue-white giant of spectral type B9IIIpHgMn at magnitude 3.31 in Lepus. Located about 186 light-years from Earth, it is a mercury-manganese star — a chemically peculiar star with enhanced concentrations of these heavy elements in its atmosphere.
Observing Tips
Mu Lep lies in the body of Lepus, the Hare below Orion. It is a white star among the modest group of stars forming the constellation. Best observed December through March.
History
Mu Leporis has no widely used traditional name. Mercury-manganese stars like Mu Lep are important for studying how atomic diffusion can concentrate rare elements in stellar atmospheres over time.
Fun Facts
Mercury-manganese stars have surface concentrations of mercury up to 100,000 times the solar value — not because the star contains more mercury, but because the calm, non-convective atmosphere allows these heavy atoms to float upward and accumulate in the visible layers.
Observe
1Physical Properties
2Position & Identifiers
3How easy to follow?
| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | Hard+ | Hard+ |
| 50 mm finder 50mm finder | Hard+ | Hard+ | Hard+ |
| 150 mm telescope 150mm scope | Hard+ | Hard+ | Hard+ |
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
5Survey Image
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6Comparison Stars for Mu Lep (3.0–3.4)
Nearby stable stars for estimating brightness (AAVSO)
Explore
8
Size Comparison
9
Compare Stars
10
Spectral Classification
11
Hertzsprung-Russell Diagram
12
Stellar Lifecycle
13
Blackbody Spectrum
14
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
15
Stellar Fusion
Discover
16Stellar Notes
17
Light Travel Time Machine
18
Relativistic Travel
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.
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
