Astro Corner
Your corner of the universe.
EN
Celestial object
140 Siwa (A874 TB)
140, 140 Siwa (A874 TB), Siwa
Make this Object part of your astronomy journeyMembers can add targets, record observations, link images and watch this Object for visibility alerts.
Reference data
RADate-dependentMoving object · use an ephemeris
DecDate-dependentMoving object · use an ephemeris
Magnitude—
Angular size—
Position angle—
Distance—
Constellation—
Solar System catalogue
JPL SBDBMoving-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.
Primary designation140
JPL SPK-ID20000140
Orbit classMBA
Orbit IDJPL 189
Near-Earth objectNo
Potentially hazardousNo
Epoch · JD2461200.5
Eccentricity0.218220781197
Semi-major axis2.730035818 AU
Perihelion distance2.134285269 AU
Orbital period1,647.6 days
Earth MOID1.118650000 AU
Jupiter Tisserand3.318000
Inclination3.19130099°
Absolute magnitude · H8.4500
Diameter109.790000 km
Albedo0.067600
Last catalogue sync2026-09-11 01:40:08
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.4 records
Community observations
No public community observations for this object yet.
Guides & knowledge
Published Guides that reference this canonical object.
No published Guides reference this object yet.
Images of this object
Confirmed manual or plate-solve links to this canonical object. Solver suggestions are excluded until confirmed by the image owner.
No visible confirmed images are linked to this object yet.