Delta Mensae — Star in Mensa
Observe
1Physical Properties
Magnitude
5.69
Spectral Type
K2-3III+A
Star Color
Orange
(B-V 0.84)
2Position & Identifiers
RA
04h 17m 59.1s
Dec
-80° 12' 50.0"
Constellation
Mensa
(Men)
HR
1426
HIP
20049
HD
28525
SAO
258372
Bayer
Delta
Querying VizieR catalog...
3How easy to spot?
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| Equipment | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| Naked eye Naked eye | Hard+ | Hard | V. hard+ |
| 50 mm finder 50mm finder | Easy | Easy | Easy |
| 150 mm telescope 150mm scope | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
4Visibility
Set a location in User Settings to see visibility data.
Best season
Oct – Dec
(peak: Nov)
5Survey Image
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Explore
6
Size Comparison
Querying VizieR for stellar data…
7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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10
Stellar Lifecycle
11
Blackbody Spectrum
12
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
13
Stellar Fusion
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 2012
Elliptical galaxy
Galaxy
mag 12.97
2.8°
Mensa
BN Hyi
Easy double, sep 15.2″
Double Star
mag 5.57
3.4°
Hydrus
NGC 1841
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 12.0
3.9°
Mensa
TZ Men
Eclipsing binary, period 8.6d
Variable Star
mag 6.20
5.1°
Mensa
Explore Nightbase
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Biography
Mensa
Mythology, bright stars, and deep-sky highlights.
Constellation
The Hertzsprung-Russell Diagram — Reading Stars Like a Map
The HR diagram turns the night sky into a physics map: every named star has a spot, every spot tells you mass, age, and fate. A guide for amateur observers.
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