This template is intended for use on articles about comets.

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1P/Halley
A color image of Comet Halley, shown flying to the left aligned flat against the sky
Discovery
Discovered byPrehistoric; named after Edmond Halley
Discovery date1758 (first predicted perihelion)
Alternative
designations
Halley's Comet, Comet Halley
Orbital characteristics A
Epoch2449400.5
(17 February 1994)
Observation arc158.39 years
No. of observations used7,428
Aphelion35.0823 AU
Perihelion0.585978 AU
Semi-major axis17.8341 AU
Eccentricity0.967143
Orbital period75.32 a
Inclination162.263°
TJupiter−0.605
Earth MOID0.064 AU
Dimensions11 km
Nucleus albedo0.04
Comet total
magnitude (M1)
5.5
Comet nuclear
magnitude (M2)
13.6
Last perihelion9 February 1986
Next perihelion28 July 2061
{{Infobox comet
| name           = 1P/Halley
| image          = [[File:Lspn comet halley.jpg|250px]]
| caption        = A color image of Comet Halley, shown flying to the left aligned flat against the sky
| discoverer     = Prehistoric; named after [[Edmond Halley]]
| discovery_date = 1758 (first ''predicted'' perihelion)
| designations   = Halley's Comet, Comet Halley
| epoch          = 2449400.5 <br /> (17 February 1994)
| obs_arc        = 158.39 years
| obs            = 7,428
| aphelion       = 35.0823 [[Astronomical unit|AU]]
| perihelion     = 0.585978 AU
| semimajor      = 17.8341 AU
| semiminor      = 
| orbital_circ   = 
| eccentricity   = 0.967143
| period         = 75.32 [[Julian year (astronomy)|a]]
| avg_speed      = 
| max_speed      = 
| min_speed      = 
| inclination    = 162.263°
| tjup           = −0.605
| Earth_moid     = 0.064 AU
| dimensions     = 11 km
| M1             = 5.5
| M2             = 13.6
| last_p         = 9 February 1986
| next_p         = 28 July 2061
}}