About: 2021 SG

Property	Value
dbo:Planet/apoapsis	4.417625121771E8
dbo:Planet/orbitalPeriod	818.16
dbo:Planet/periapsis	7.07597928411E7
dbo:abstract	2021 SG is a near-Earth asteroid, with an estimated diameter of 42 to 94 meters, that passed about half a lunar distance from Earth on 16 September 2021. It approached from the direction of the Sun, so it was invisible until a day later. It completes its highly eccentric orbit in 2.24 years. 2021 SG is an Apollo asteroid with a 1.71 AU semimajor axis, and a 0.473 AU perihelion (near Mercury at perihelion) out to a 2.95 AU aphelion (between Mars and Jupiter). With an absolute magnitude (H) of 24.0, it is possibly the largest asteroid to pass within 1 lunar distance of Earth during 2021. (en)
dbo:apoapsis	441762512177.099976 (xsd:double)
dbo:apparentMagnitude	13.400000 (xsd:double)
dbo:discovered	2020-09-17 (xsd:date)
dbo:discoverer	dbr:Zwicky_Transient_Facility
dbo:epoch	21 January 2022 (JD2459600.5)
dbo:formerName	(en) ZTF0MtF  (en)
dbo:orbitalPeriod	70689024.000000 (xsd:double)
dbo:periapsis	70759792841.100006 (xsd:double)
dbo:thumbnail	wiki-commons:Special:FilePath/2021_SG-orbit.png?width=300
dbo:wikiPageID	68802317 (xsd:integer)
dbo:wikiPageLength	4723 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID	1101285390 (xsd:integer)
dbo:wikiPageWikiLink	dbr:Degree_(angle) dbr:Apollo_asteroid dbr:Julian_day dbr:Perihelion dbc:Apollo_asteroids dbc:Astronomical_objects_discovered_in_2021 dbc:Near-Earth_objects_in_2021 dbc:Minor_planet_object_articles_(unnumbered) dbr:Aphelion dbr:Lunar_distance_(astronomy) dbr:Palomar_Observatory dbr:Absolute_magnitude dbc:Discoveries_by_the_Zwicky_Transient_Facility dbr:Astronomical_unit dbr:Jupiter dbr:Mars dbr:Mercury_(planet) dbr:Near-Earth_asteroid dbr:Near-Earth_object dbr:Zwicky_Transient_Facility dbr:Semimajor_axis dbr:Eccentricity_(astronomy)
dbp:absMagnitude	(en)
dbp:altNames	ZTF0MtF  (en)
dbp:aphelion	2.953
dbp:argPeri	256.579000 (xsd:double)
dbp:ascNode	352.203000 (xsd:double)
dbp:background	#FFC2E0 (en)
dbp:caption	Orbit of 2021 SG (en)
dbp:discovered	2020-09-17 (xsd:date)
dbp:discoverer	dbr:Zwicky_Transient_Facility
dbp:discoveryRef	(en)
dbp:discoverySite	dbr:Palomar_Observatory
dbp:eccentricity	0.723800 (xsd:double)
dbp:epoch	2022-01-21 (xsd:date)
dbp:imageSize	250 (xsd:integer)
dbp:inclination	3.176000 (xsd:double)
dbp:magnitude	13.400000 (xsd:double)
dbp:meanAnomaly	76.606000 (xsd:double)
dbp:meanDiameter	42 (xsd:integer)
dbp:meanMotion	/ day (en)
dbp:minorplanet	yes (en)
dbp:mpCategory	(en) NEOApollo  (en)
dbp:mpcName	2021 (xsd:integer)
dbp:name	2021 (xsd:integer)
dbp:observationArc	604800.0
dbp:orbitRef	(en)
dbp:perihelion	0.473
dbp:period	7.0689024E7
dbp:semimajor	1.713
dbp:uncertainty	7 (xsd:integer)
dbp:wikiPageUsesTemplate	dbt:2021_in_space dbt:Commons_category dbt:Cvt dbt:Deg2DMS dbt:Infobox_planet dbt:JPL_small_body dbt:NE-asteroid-stub dbt:Portal_bar dbt:Reflist dbt:Short_description dbt:Small_Solar_System_bodies dbt:Use_dmy_dates dbt:Val dbt:·
dcterms:subject	dbc:Apollo_asteroids dbc:Astronomical_objects_discovered_in_2021 dbc:Near-Earth_objects_in_2021 dbc:Minor_planet_object_articles_(unnumbered) dbc:Discoveries_by_the_Zwicky_Transient_Facility
rdf:type	owl:Thing dbo:Place dbo:Location schema:Place dbo:CelestialBody wikidata:Q634 dbo:Planet
rdfs:comment	2021 SG is a near-Earth asteroid, with an estimated diameter of 42 to 94 meters, that passed about half a lunar distance from Earth on 16 September 2021. It approached from the direction of the Sun, so it was invisible until a day later. It completes its highly eccentric orbit in 2.24 years. 2021 SG is an Apollo asteroid with a 1.71 AU semimajor axis, and a 0.473 AU perihelion (near Mercury at perihelion) out to a 2.95 AU aphelion (between Mars and Jupiter). With an absolute magnitude (H) of 24.0, it is possibly the largest asteroid to pass within 1 lunar distance of Earth during 2021. (en)
rdfs:label	2021 SG (en)
owl:sameAs	wikidata:2021 SG https://global.dbpedia.org/id/G6HaF
prov:wasDerivedFrom	wikipedia-en:2021_SG?oldid=1101285390&ns=0
foaf:depiction	wiki-commons:Special:FilePath/2021_SG-orbit.png
foaf:isPrimaryTopicOf	wikipedia-en:2021_SG
foaf:name	(en) 2021 SG (en)
is foaf:primaryTopic of	wikipedia-en:2021_SG