Alpha Tauri

E140926

Alpha Tauri, better known as Aldebaran, is a bright orange giant star in the constellation Taurus and one of the most prominent stars in the night sky.

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All labels observed (2)

Label Occurrences
Alpha Tauri canonical 8
AlphaTauri 1

Statements (45)

Predicate Object
instanceOf K-type giant star
orange giant star
star
age about 6 billion years (order of magnitude)
alsoKnownAs Aldebaran
Alpha Tauri (α Tauri)
apparentMagnitude about 0.85
bayerDesignation Aldebaran
surface form: α Tauri
belongsToAsterism Hyades (line-of-sight, not physically bound)
canBeOccultedBy Moon
planets (rarely)
color orange
culturalSignificance one of the brightest stars in the night sky
declination +16° 30′ 33″
distanceFromEarth about 20 parsecs
about 65 light-years
eclipticLatitude near the ecliptic
effectiveTemperature about 3900 K
evolutionaryStage red giant branch star
flamsteedDesignation 87 Tauri
galacticPopulation thin disk star
hasCompanion faint red dwarf candidate (wide separation, debated)
hasExoplanetCandidate Aldebaran planetary system
surface form: Aldebaran b (candidate)
hdDesignation HD 29139
hipparcosDesignation HIP 21421
hostConstellationAbbreviation Tau
hrDesignation HR 1457
isBrightestStarOf Taurus
isReferenceStarFor calibration of stellar atmosphere models
locatedInConstellation Taurus
luminosity about 400 times the luminosity of the Sun
mass about 1.2 times the mass of the Sun
metallicity slightly above solar
observedFrom Northern Hemisphere
Southern Hemisphere (low northern latitudes)
parallax about 50 milliarcseconds
properMotionDec −189 mas/yr (approximate)
properMotionRA +62 mas/yr (approximate)
radialVelocity about +54 km/s
radius about 44 times the radius of the Sun
rankByBrightness among the 15 brightest stars in the night sky
rightAscension 04h 35m 55.2s
spectralType K5 III
variableStarType slight irregular variability
visibleToNakedEye yes

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.
Input
Subject: Alpha Tauri
Description of subject: Alpha Tauri, better known as Aldebaran, is a bright orange giant star in the constellation Taurus and one of the most prominent stars in the night sky.

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Aldebaran (foreground star, not a member) bayerDesignation Alpha Tauri
subject surface form: Aldebaran
HR 1457 alsoKnownAs Alpha Tauri
HR 1457 hasBayerDesignation Alpha Tauri
HD 29139 hasBayerDesignation Alpha Tauri
HIP 21421 alsoKnownAs Alpha Tauri
SAO 94027 hasBayerDesignation Alpha Tauri
Aldebaran bayerDesignation Alpha Tauri
Scuderia AlphaTauri mainSponsor Alpha Tauri
this entity surface form: AlphaTauri