55 Cancri
E572580
55 Cancri is a binary star system in the constellation Cancer that is notable for hosting multiple exoplanets, including one of the first known super-Earths.
All labels observed (7)
| Label | Occurrences |
|---|---|
| 55 Cancri A | 6 |
| 55 Cancri canonical | 5 |
| 55 Cancri B | 2 |
| 55 Cancri e | 2 |
| 55 Cancri planetary system | 1 |
| 55 Cnc | 1 |
| ρ¹ Cancri | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6174813 — 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: 55 Cancri Context triple: [Cancri, exampleUsage, 55 Cancri]
-
A.
Delta Cancri
Delta Cancri is a prominent star in the constellation Cancer, known as Asellus Australis and used as a reference point near the Beehive Cluster in the night sky.
-
B.
Gamma Cancri
Gamma Cancri is a white giant star in the constellation Cancer, visible to the naked eye and commonly used as a reference point in the night sky.
-
C.
HIP 60718
HIP 60718 is the Hipparcos catalog designation for Alpha Crucis, the brightest star in the Southern Cross constellation.
-
D.
Epsilon Microscopii
Epsilon Microscopii is a relatively bright star located in the southern constellation Microscopium.
-
E.
Beta Eridani
Beta Eridani, traditionally known as Cursa, is a bright blue-white giant star in the constellation Eridanus visible to the naked eye.
- 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: 55 Cancri Target entity description: 55 Cancri is a binary star system in the constellation Cancer that is notable for hosting multiple exoplanets, including one of the first known super-Earths.
-
A.
Delta Cancri
Delta Cancri is a prominent star in the constellation Cancer, known as Asellus Australis and used as a reference point near the Beehive Cluster in the night sky.
-
B.
Gamma Cancri
Gamma Cancri is a white giant star in the constellation Cancer, visible to the naked eye and commonly used as a reference point in the night sky.
-
C.
HIP 60718
HIP 60718 is the Hipparcos catalog designation for Alpha Crucis, the brightest star in the Southern Cross constellation.
-
D.
Epsilon Microscopii
Epsilon Microscopii is a relatively bright star located in the southern constellation Microscopium.
-
E.
Beta Eridani
Beta Eridani, traditionally known as Cursa, is a bright blue-white giant star in the constellation Eridanus visible to the naked eye.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
binary star system
ⓘ
exoplanet ⓘ main-sequence star ⓘ planetary system ⓘ red dwarf star ⓘ |
| age | about 8 billion years ⓘ |
| apparentMagnitudeV | 5.95 ⓘ |
| constellation | Cancer ⓘ |
| declination | +28° 19′ 51″ ⓘ |
| discoveryMethod |
radial velocity
ⓘ
radial velocity ⓘ |
| discoveryYear |
1996
ⓘ
2004 ⓘ |
| distanceFromEarth |
about 12.6 parsecs
ⓘ
about 41 light-years ⓘ |
| effectiveTemperature | about 5196 K ⓘ |
| hasComponent |
55 Cancri A
ⓘ
linked to:
55 Cancri
55 Cancri B ⓘ
linked to:
55 Cancri
|
| hasExoplanet |
55 Cancri b
ⓘ
55 Cancri c ⓘ 55 Cancri d ⓘ 55 Cancri e ⓘ
linked to:
55 Cancri
55 Cancri f ⓘ |
| hostStar |
55 Cancri A
ⓘ
linked to:
55 Cancri
|
| mass |
about 0.26 solar masses
ⓘ
about 0.91 solar masses ⓘ about 8 Earth masses ⓘ |
| metallicity[Fe/H] | about +0.31 ⓘ |
| notableFor | hosting one of the first known super-Earth exoplanets ⓘ |
| orbitalPeriod |
about 0.74 days
ⓘ
about 14.65 days ⓘ about 14.65 years ⓘ about 260 days ⓘ about 44.4 days ⓘ |
| otherName |
Copernicus
ⓘ
Rho¹ Cancri ⓘ
linked to:
Rho Cancri
ρ¹ Cancri ⓘ
linked to:
55 Cancri
|
| planetType |
gas giant
ⓘ
gas giant ⓘ gas giant ⓘ gas giant ⓘ super-Earth ⓘ |
| projectedSeparationFrom55CancriA | about 1065 AU ⓘ |
| radius |
about 0.94 solar radii
ⓘ
about 1.9 Earth radii ⓘ |
| rightAscension | 08h 52m 35.8s ⓘ |
| semiMajorAxis | about 0.0156 AU ⓘ |
| spectralType |
G8V
ⓘ
M4.5V ⓘ |
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: 55 Cancri Description of subject: 55 Cancri is a binary star system in the constellation Cancer that is notable for hosting multiple exoplanets, including one of the first known super-Earths.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: 55 Cancri
linked to: 55 Cancri
linked to: 55 Cancri
linked to: 55 Cancri
linked to: 55 Cancri
linked to: 55 Cancri
linked to: 55 Cancri
subject linked to:
Rho Cancri
linked to: 55 Cancri
linked to: 55 Cancri
subject linked to:
Rho Cancri
linked to: 55 Cancri
subject linked to:
Rho Cancri
linked to: 55 Cancri