Mariner 2
E272868
Mariner 2 was a NASA space probe launched in 1962 that became the first successful mission to conduct a close-up flyby and scientific study of Venus.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mariner 2 canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T2494605 — 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: Mariner 2 Context triple: [Atlas, notablePayload, Mariner 2]
-
A.
Mariner 4
Mariner 4 was a NASA spacecraft that performed the first successful flyby of Mars in 1965, returning the first close-up images of another planet.
-
B.
Viking 2
Viking 2 was a NASA spacecraft and lander that conducted scientific investigations on the surface of Mars as part of the Viking program in the 1970s.
-
C.
Mariner 10
Mariner 10 was a NASA space probe launched in 1973 that became the first spacecraft to visit Mercury and the first to use a gravity-assist maneuver to reach another planet.
-
D.
Viking 1
Viking 1 was a NASA spacecraft that became the first successful lander on Mars, conducting detailed imaging and scientific experiments on the Martian surface starting in 1976.
-
E.
Pioneer 11
Pioneer 11 is a NASA space probe launched in 1973 that conducted pioneering flybys of Jupiter and Saturn, helping to open the outer solar system to exploration.
- 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: Mariner 2 Target entity description: Mariner 2 was a NASA space probe launched in 1962 that became the first successful mission to conduct a close-up flyby and scientific study of Venus.
-
A.
Mariner 4
Mariner 4 was a NASA spacecraft that performed the first successful flyby of Mars in 1965, returning the first close-up images of another planet.
-
B.
Viking 2
Viking 2 was a NASA spacecraft and lander that conducted scientific investigations on the surface of Mars as part of the Viking program in the 1970s.
-
C.
Mariner 10
Mariner 10 was a NASA space probe launched in 1973 that became the first spacecraft to visit Mercury and the first to use a gravity-assist maneuver to reach another planet.
-
D.
Viking 1
Viking 1 was a NASA spacecraft that became the first successful lander on Mars, conducting detailed imaging and scientific experiments on the Martian surface starting in 1976.
-
E.
Pioneer 11
Pioneer 11 is a NASA space probe launched in 1973 that conducted pioneering flybys of Jupiter and Saturn, helping to open the outer solar system to exploration.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
planetary probe
ⓘ
space probe ⓘ uncrewed spacecraft ⓘ |
| attitudeControl | three-axis stabilized ⓘ |
| carriedInstrument |
charged particle detector
ⓘ
cosmic dust detector ⓘ infrared radiometer ⓘ magnetometer ⓘ microwave radiometer ⓘ solar plasma spectrometer ⓘ |
| closestApproachDate | 1962-12-14 ⓘ |
| closestApproachDistance | about 34,800 kilometers ⓘ |
| closestApproachTarget | Venus ⓘ |
| communicationBand | S-band radio ⓘ |
| confirmed |
Venus has a predominantly carbon dioxide atmosphere
ⓘ
linked to:
Venus
extremely hot, dense atmosphere on Venus ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| discovered | very high surface temperatures on Venus ⓘ |
| enteredHeliocentricOrbit | 1962-08-27 ⓘ |
| followedBy | Mariner 3 ⓘ |
| found |
no detectable global magnetic field at Venus
ⓘ
slow rotation of Venus ⓘ |
| historicalSignificance |
early milestone of the Space Race
ⓘ
first successful mission of NASA’s Mariner program ⓘ |
| launchDate | 1962-08-27 ⓘ |
| launchSite | Cape Canaveral Air Force Station Launch Complex 12 ⓘ |
| launchVehicle |
Atlas LV-3 Agena-B
ⓘ
linked to:
Lockheed Agena upper stage
|
| launchYear | 1962 ⓘ |
| massAtLaunch | approximately 203 kilograms ⓘ |
| missionDuration | about 4 months to Venus encounter ⓘ |
| missionEnd | 1963-01-03 ⓘ |
| missionType | flyby ⓘ |
| notableAchievement |
first successful close-up scientific study of Venus
ⓘ
first successful spacecraft to fly by another planet ⓘ |
| operator | NASA ⓘ |
| powerSource |
chemical batteries
ⓘ
solar panels ⓘ |
| precededBy | Mariner 1 ⓘ |
| primaryScienceObjective |
measure temperature and atmosphere of Venus
ⓘ
study interplanetary space between Earth and Venus ⓘ |
| program | Mariner program ⓘ |
| propulsion | monopropellant hydrazine system ⓘ |
| solarPanelSpan | about 5.05 meters ⓘ |
| spaceAgency |
National Aeronautics and Space Administration
ⓘ
linked to:
NASA
|
| spacecraftBus | Mariner R bus ⓘ |
| status | mission completed ⓘ |
| target | Venus ⓘ |
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: Mariner 2 Description of subject: Mariner 2 was a NASA space probe launched in 1962 that became the first successful mission to conduct a close-up flyby and scientific study of Venus.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.