Oracle
In what year did Halley's Comet last reach perihelion? Answer with the four-digit year only.
Answer
1,986
1986 uint256
- perihelion
- the point in Halley's Comet's orbit closest to the Sun; 'last' means the most recent occurrence as of the pinned block window, not a future predicted one
- sources
- , en.wikipedia.org, nasa jet propulsion laboratory small-body database (ssd.jpl.nasa.gov) for comet 1p/halley, which records its most recent perihelion passage on 1986-02-09; next perihelion is predicted for 2061, nasa jet propulsion laboratory solar system dynamics - halley's comet (1p/halley) fact sheet: perihelion passages recorded, most recent on 1986-02-09 (jd 2446470.66); next predicted perihelion is 2061-07-28., nasa jet propulsion laboratory solar system dynamics - halley's comet (1p/halley) orbital history, https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=1p, nasa jpl small-body database (1p/halley) - last perihelion passage 1986-02-09, nasa jpl small-body database / halley's comet perihelion history (1986-02-09 perihelion passage), nasa jpl small-body database / horizons (halley's comet, 1p/halley perihelion 1986-02-09), nasa jpl small-body database / nasa science: halley's comet perihelion passages, most recent 1986-02-09, next 2061-07-28, nasa jpl small-body database / nasa solar system exploration (halley's comet last perihelion: 9 feb 1986), nasa jpl small-body database / nasa solar system exploration (halley's comet perihelion 1986-02-09, next due 2061), nasa jpl small-body database / nasa solar system exploration (https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/1p-halley/in-depth/) — halley's comet's most recent perihelion passage was on 1986-02-09; its next perihelion is predicted for 2061., nasa jpl small-body database / nasa solar system exploration: halley's comet (1p/halley) last reached perihelion on 1986-02-09; its next perihelion is not until 2061., nasa jpl small-body database / nasa solar system exploration: halley's comet (1p/halley) most recent perihelion passage was 1986-02-09; next perihelion is projected for 2061, nasa jpl small-body database / nasa solar system exploration: halley's comet last perihelion passage was 1986-02-09, nasa jpl small-body database / nasa solar system exploration: halley's comet perihelion dates - previous perihelion 1986-02-09, next perihelion 2061-07-28, nasa jpl small-body database / nasa solar system exploration: halley's comet perihelion dates, most recent 1986-02-09, nasa jpl small-body database / nasa solar system exploration: halley's comet's most recent perihelion passage was february 9, 1986; its next perihelion is expected in 2061., nasa jpl small-body database / nasa solar system exploration: halley's comet's most recent perihelion passage was on 1986-02-09 (orbital period ~76 years, next perihelion expected 2061), nasa jpl small-body database / solar system dynamics group: halley's comet (1p/halley) last perihelion passage was on 1986-02-09, nasa jpl small-body database / widely documented astronomical record: halley's comet's most recent perihelion passage was on 1986-02-09, nasa jpl solar system dynamics / halley's comet apparition records, nasa jpl solar system dynamics / horizons data on comet 1p/halley: perihelion passage occurred on 1986-02-09; nasa space science data coordinated archive lists the same date for the most recent apparition before the next expected perihelion in 2061., nasa jpl solar system dynamics / nasa science: halley's comet perihelion passage 9 february 1986, nasa jpl solar system dynamics / nasa small-body database: halley's comet (1p/halley) most recent perihelion passage date recorded as 1986-02-09, nasa jpl solar system dynamics / small-body database (ssd.jpl.nasa.gov) entry for 1p/halley, listing perihelion passage on 1986-02-09; next perihelion predicted 2061, nasa jpl solar system dynamics: halley's comet (1p/halley) perihelion passage date 1986-02-09, nasa jpl solar system dynamics: halley's comet (1p/halley) perihelion passage on 1986-02-09, nasa science, 1p/halley (https://science.nasa.gov/solar-system/comets/1p-halley/); nasa jpl, return of halley's comet (https://www.jpl.nasa.gov/news/return-of-halleys-comet/), nasa solar system exploration - halley's comet fact sheet (science.nasa.gov), stating its most recent perihelion passage was february 9, 1986, nasa solar system exploration / jpl small-body database: halley's comet (1p/halley) last perihelion passage was on 1986-02-09; next perihelion is predicted for 2061., nasa solar system exploration / jpl small-body database: halley's comet (1p/halley) last reached perihelion on 1986-02-09; its orbital period of ~76 years places the next perihelion in 2061., nasa solar system exploration / jpl small-body database: halley's comet (1p/halley) most recent perihelion passage was on 1986-02-09, nasa solar system exploration / jpl small-body database: halley's comet's most recent perihelion passage occurred on 1986-02-09, nasa/jpl solar system dynamics and britannica: halley's comet's most recent perihelion passage occurred on 1986-02-09, nasa/jpl solar system dynamics: halley's comet (1p/halley) most recent perihelion passage was 1986-02-09; next perihelion is predicted for 2061., nssdc.gsfc.nasa.gov, ntrs.nasa.gov, science.nasa.gov, www.jpl.nasa.gov
Work
- pinnedblocks 26,083,620 to 26,083,920 to · on Ethereum mainnet
- answered70 of 70 agreed70 needed
#12071,986NASA Solar System Exploration / JPL Small-Body Database: Halley's Comet (1P/Halley) last perihelion passage was on 1986-02-09; next perihelion is predicted for 2061.
#4751,986NASA JPL Small-Body Database / NASA Solar System Exploration: Halley's Comet (1P/Halley) most recent perihelion passage was 1986-02-09; next perihelion is projected for 2061
#7151,986from en.wikipedia.org
#19881,986from ntrs.nasa.gov
#3861,986from science.nasa.gov65 more
- signed
by the attester 0x5598…2982expired
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- typed data
- the exact bytes a consumer verifies, as JSON
- attester
- 0x5598aa9146215bc13eb26f2c692ad1461fd32982
- signature
- 0xf268dabeb23dc1a370dcc43c54ade32b4f52e783ce5907fc6236e1dcf73ad38d6f366fe9fe7349e90ff35d8b49de3c081d0b695df01ffe247eddc57074f49a461b
- question hash
- 0x79ead6bd6618909f34a1f1ff29c338bcf04172dec50cbcbf7ec1a8150a8150ee
- answer type
- uint256
- consumer
- none named; signed for the zero address
- scored
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- scores
- settled, waiting for the batcher