variable star Algol
E554036
Variable star Algol is a famous eclipsing binary system in the constellation Perseus whose periodic dimming made it one of the first known variable stars.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Algol star system | 1 |
| variable star Algol canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5911138 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: variable star Algol Context triple: [Perseus constellation, notableFor, variable star Algol]
-
A.
variable star Zeta Scuti
Variable star Zeta Scuti is a pulsating star in the constellation Scutum whose brightness changes over time due to intrinsic stellar variability.
-
B.
variable star R Scuti
R Scuti is a luminous RV Tauri-type pulsating variable star in the constellation Scutum, notable for its large, irregular brightness variations and advanced evolutionary stage.
-
C.
variable star VY Scuti
Variable star VY Scuti is a highly luminous red supergiant located in the constellation Scutum and is among the largest known stars by radius.
-
D.
Algol family
The Algol family is a group of closely related imperative programming languages that pioneered block structure and influenced many later languages such as Pascal, C, and Java.
-
E.
variable star WZ Scuti
Variable star WZ Scuti is a pulsating variable star located in the constellation Scutum, known for its brightness variations over time.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: variable star Algol Target entity description: Variable star Algol is a famous eclipsing binary system in the constellation Perseus whose periodic dimming made it one of the first known variable stars.
-
A.
variable star Zeta Scuti
Variable star Zeta Scuti is a pulsating star in the constellation Scutum whose brightness changes over time due to intrinsic stellar variability.
-
B.
variable star R Scuti
R Scuti is a luminous RV Tauri-type pulsating variable star in the constellation Scutum, notable for its large, irregular brightness variations and advanced evolutionary stage.
-
C.
variable star VY Scuti
Variable star VY Scuti is a highly luminous red supergiant located in the constellation Scutum and is among the largest known stars by radius.
-
D.
Algol family
The Algol family is a group of closely related imperative programming languages that pioneered block structure and influenced many later languages such as Pascal, C, and Java.
-
E.
variable star WZ Scuti
Variable star WZ Scuti is a pulsating variable star located in the constellation Scutum, known for its brightness variations over time.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
eclipsing binary star system
ⓘ
main-sequence star ⓘ spectroscopic binary ⓘ subgiant star ⓘ variable star ⓘ |
| apparentMagnitudeAtMaximum | 2.1 ⓘ |
| apparentMagnitudeAtMinimum | 3.4 ⓘ |
| apparentMagnitudeRange | 2.1–3.4 ⓘ |
| catalogIdentifier |
BD+40 673
NERFINISHED
ⓘ
HD 19356 NERFINISHED ⓘ HIP 14576 NERFINISHED ⓘ HR 936 NERFINISHED ⓘ |
| component |
Algol A
NERFINISHED
ⓘ
Algol B NERFINISHED ⓘ Algol C NERFINISHED ⓘ |
| constellation | Perseus NERFINISHED ⓘ |
| declination | +40° 57′ 20″ ⓘ |
| discovererOfVariability | Gemini astronomer Geminiano Montanari NERFINISHED ⓘ |
| distanceFromEarth |
about 28 parsecs
ⓘ
about 90 light-years ⓘ |
| hasCulturalAssociation |
Medusa’s head in Greek mythology
NERFINISHED
ⓘ
considered an unlucky or demon star in historical astrology ⓘ |
| lightCurveFeature |
primary eclipse causes major dimming
ⓘ
secondary eclipse causes minor dimming ⓘ |
| mass |
about 0.8 solar masses
ⓘ
about 1.7 solar masses ⓘ about 3.4 solar masses ⓘ |
| massTransfer | occurs from Algol B to Algol A ⓘ |
| orbitalPeriodOfInnerBinary | about 2.867 days ⓘ |
| orbitalPeriodOfOuterComponent | about 1.86 years ⓘ |
| otherName |
Beta Persei
NERFINISHED
ⓘ
Demon Star NERFINISHED ⓘ β Persei NERFINISHED ⓘ |
| period | about 2.867 days ⓘ |
| phenomenon | Algol paradox ⓘ |
| primaryEclipseDuration | about 10 hours ⓘ |
| radius |
about 2.9 solar radii
ⓘ
about 3.5 solar radii ⓘ |
| rightAscension | 03h 08m 10.1s ⓘ |
| spectralType |
A7 V
ⓘ
B8 V ⓘ K2 IV ⓘ |
| variabilityRecognizedIn | 17th century ⓘ |
| variableStarDesignation | Beta Persei NERFINISHED ⓘ |
| variableType | EA (Algol-type eclipsing binary) ⓘ |
| wasOneOfFirstKnown |
eclipsing binaries
ⓘ
periodic variable stars ⓘ |
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: variable star Algol Description of subject: Variable star Algol is a famous eclipsing binary system in the constellation Perseus whose periodic dimming made it one of the first known variable stars.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Algol star system