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Albaldah — Double Star in Sagittarius

HIP 94141; Pi Sagittarii; 41 Sagittarii

Magnitude 2.9m DoubleStar Sagittarius (Sgr) Visible
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About Albaldah

Description

Albaldah is a yellow-white giant of spectral type F2II at magnitude 2.89 in Sagittarius. Located about 440 light-years from Earth, it has a luminosity of roughly 4,100 times solar. It lies in the upper part of the Teapot asterism, near the lid.

Observing Tips

Albaldah lies near the top of the Sagittarius Teapot, between the lid and the handle. It is a warm white star in the rich Milky Way star clouds. Best observed July through September when Sagittarius is at its highest.

History

The name Albaldah comes from the Arabic 'al-balda,' meaning 'the town' or 'the district,' referring to an asterism in Arabic tradition. It lies near the densest part of the Milky Way visible from northern latitudes.

Fun Facts

The region around Albaldah is one of the densest areas of the Milky Way visible to the naked eye. Binoculars reveal an astonishing wealth of star clouds, clusters, and nebulae in every direction from this star.

Observe

1Physical Properties

Magnitude 2.89
Spectral Type F2II-III bright giant
Star Color Yellow-white (B-V 0.35)
Distance 507 ly

2Position & Identifiers

RA 19h 09m 45.8s
Dec -21° 01' 25.0"
Constellation Sagittarius (Sgr)
HR 7264
HIP 94141
HD 178524
SAO 187756
Bayer Pi
Flamsteed 41 Sgr

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Easy Easy
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

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Best season Jun – Aug (peak: Jul)

5Multiple Star System Triple

Components 3 (triple)
Component IDs AB
Separation 0.1″
Companion Mag 3.6
Position Angle 179°
Star Colors A: Yellow-white
Discoverer FIN 311
AB, combined mag., colors, sep. 0.093". Third component 6.0v at 0.4".

Separation over time

Measured 1936 → 1989 (53 y)
Separation drift 0.10" → 0.10" (+0.00")
Rate +0.0000" / y
PA drift 152° → 179° (+27°, +0.509°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.

Explore

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Size Comparison

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Compare Stars

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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Blackbody Spectrum

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Stellar Absorption Spectrum

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

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Stellar Fusion

Discover

15Stellar Notes

Red star Pleiades group.
Albaldah; Al Baldah.
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Light Travel Time Machine

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Relativistic Travel

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