Menu

Tau Lupi — Star in Lupus

HIP 70576; Tau2 Lupi

Magnitude 4.3m Star Lupus (Lup) Visible
Star Map
+ List + Plan

Observe

1Physical Properties

Magnitude 4.35
Spectral Type F4IV+A7: subgiant
Star Color Yellow-white (B-V 0.43)
Distance 1,631 ly

2Position & Identifiers

RA 14h 26m 10.8s
Dec -45° 22' 46.0"
Constellation Lupus (Lup)
HR 5396
HIP 70576
HD 126354
SAO 224920
Bayer Tau2
SIMBAD Wikipedia

3How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium+ Medium
50mm finder Easy Easy Easy
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 Mar – May (peak: Apr)

5Survey Image

Loading survey image…

Explore

7

Size Comparison

Querying VizieR for stellar data…
8

Compare Stars

9

Spectral Classification

10

Hertzsprung-Russell Diagram

Loading HR diagram…
Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

14

Stellar Fusion

Discover

15Stellar Notes

Binary. Combined mag., colors.
3043d.
16

Light Travel Time Machine

17

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.

NGC 5670
Medium
Bright spiral galaxy
Galaxy mag 11.96 1.7° Lupus
Alpha Lup
Easy
Bright naked-eye star, mag 2.3
Star mag 2.30 3.4° Lupus
Eta Cen
Easy
Bright naked-eye star, mag 2.3
Star mag 2.31 3.6° Centaurus
NGC 5460
Easy
Rich open cluster
Open Cluster mag 5.6 4.4° Centaurus
Chi Cen
Easy
Colorful double, sep 85.2″
Double Star mag 4.36 5.6° Centaurus
C84
NGC 5286
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 7.6 8.9° Centaurus
Show on Map

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
Lupus
Mythology, bright stars, and deep-sky highlights.
Constellation
}