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Celestial object

C/1999 M1 (SOHO)

1999 M1, C/1999 M1 (SOHO), SOHO

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Reference data

RADate-dependentMoving object · use an ephemeris

DecDate-dependentMoving object · use an ephemeris

Magnitude8.400

Angular size8.0′ × 4.0′

Position angle—

Distance—

ConstellationTau

Solar System catalogue

Moving-object reference

Comets and minor planets move against the background sky. Astro Corner therefore keeps their orbital catalogue record separately and does not pretend a single RA/Dec is permanently correct.

JPL SBDB

Primary designation1999 M1

JPL SPK-ID1001460

Orbit classPAR

Orbit IDSAO_2008

Near-Earth objectNo

Potentially hazardousNo

Epoch · JD2451346.43

Eccentricity1.000000000000

Semi-major axis—

Perihelion distance0.005500000 AU

Orbital period—

Earth MOID—

Jupiter Tisserand—

Inclination144.21000000°

Absolute magnitude · H—

Diameter—

Albedo—

Last catalogue sync2026-09-18 09:30:02

Planning coordinates are intentionally separate.A later Horizons ephemeris layer can calculate the object's apparent position for a specific date, time and observing location. Until then, static-sky tools are hidden for this record rather than showing misleading coordinates.

Open JPL Small-Body Database

Reference transparencySources & data provenanceSee where catalogue identities and imported reference fields came from.10 records

Catalogue identities

COMETC/1999 M1 (SOHO)NASA/JPL Small-Body DatabaseSource

JPL_SBDBJPL 1001460NASA/JPL Small-Body DatabaseSource

Reference fields

Angular Size Major ArcminOpenNGC via GAVO TAP2026-09-11 03:00:10Source

Angular Size Minor ArcminOpenNGC via GAVO TAP2026-09-11 03:00:10Source

Canonical NameNASA/JPL Small-Body Database2026-09-11 03:00:06Source

ConstellationOpenNGC via GAVO TAP2026-09-11 03:00:10Source

Dec DegOpenNGC via GAVO TAP2026-09-11 03:00:10Source

MagnitudeOpenNGC via GAVO TAP2026-09-11 03:00:10Source

Ra DegOpenNGC via GAVO TAP2026-09-11 03:00:10Source

Small Body OrbitNASA/JPL Small-Body Database2026-09-11 03:00:06Source

Community observations

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Guides & knowledge

Published Guides that reference this canonical object.

Knowledge library

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Images of this object

Confirmed manual or plate-solve links to this canonical object. Solver suggestions are excluded until confirmed by the image owner.

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