2018 AG37

2018 AG₃₇
	2018 AG37, pictures (or images) from the Gemini North telescope in 2019
Discovery
Discovered by	S. S. Sheppard; D. J. Tholen; C. Trujillo;
Discovery site	Mauna Kea Obs.
Discovery date	15 January 2018; (first observed)
Designations
MPC designation	2018 AG37
Alternative designations	"FarFarOut" (nickname)
Minor planet category	SDO; TNO; distant; centaur;
Orbital characteristics
	Epoch 2019-Feb-26 (JD 2458540.5)
	Uncertainty parameter 9
Observation arc	2.03 yr (740 days) using 11 observations
Aphelion	132.7±7.4 AU
Perihelion	27.63±0.17 AU
Semi-major axis	80.2±4.5 AU
Eccentricity	0.655±0.02
Orbital period	717.8±60 yr
Mean anomaly	186.9°±219°
Mean motion	0° 0m 4.949s / day
Inclination	18.68°±0.12°
Longitude of ascending node	68.35°±0.53°
Time of periastron	≈2366?
Argument of perihelion	231.9°±60°
Neptune MOID	≈3 AU (450 million km)
Physical characteristics
Mean diameter	≈400 km (est.); 797 km (est.);
Geometric albedo	0.057 (est.)
Apparent magnitude	25.3
Absolute magnitude (H)	4.22±0.10; 4.22;

2018 AG₃₇ is a dwarf planet. Its nickname is FarFarOut.^[8]

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↑ ^1.0 ^1.1 Cite error: The named reference MPEC-2021-C187 was used but no text was provided for refs named (see the help page).
↑ ^2.0 ^2.1 ^2.2 ^2.3 Cite error: The named reference MPC-object was used but no text was provided for refs named (see the help page).
↑ ^3.0 ^3.1 Cite error: The named reference Carnegie was used but no text was provided for refs named (see the help page).
↑ Cite error: The named reference MPC-Cen-SDO-List was used but no text was provided for refs named (see the help page).
↑ ^5.0 ^5.1 ^5.2 Cite error: The named reference jpldata was used but no text was provided for refs named (see the help page).
↑ ^6.0 ^6.1 ^6.2 Cite error: The named reference Johnston-TNOs was used but no text was provided for refs named (see the help page).
↑ Cite error: The named reference Buie-DES was used but no text was provided for refs named (see the help page).
↑ "dwarf planet, n.", Oxford English Dictionary, Oxford University Press, 2023-03-02, retrieved 2024-06-19

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).

[MPEC-2021-C187-1] 1.0 ^1.1 Cite error: The named reference MPEC-2021-C187 was used but no text was provided for refs named (see the help page).

[MPC-object-2] 2.0 ^2.1 ^2.2 ^2.3 Cite error: The named reference MPC-object was used but no text was provided for refs named (see the help page).

[Carnegie-3] 3.0 ^3.1 Cite error: The named reference Carnegie was used but no text was provided for refs named (see the help page).

[MPC-Cen-SDO-List-4] Cite error: The named reference MPC-Cen-SDO-List was used but no text was provided for refs named (see the help page).

[jpldata-5] 5.0 ^5.1 ^5.2 Cite error: The named reference jpldata was used but no text was provided for refs named (see the help page).

[Johnston-TNOs-6] 6.0 ^6.1 ^6.2 Cite error: The named reference Johnston-TNOs was used but no text was provided for refs named (see the help page).

[Buie-DES-7] Cite error: The named reference Buie-DES was used but no text was provided for refs named (see the help page).

[9] "dwarf planet, n.", Oxford English Dictionary, Oxford University Press, 2023-03-02, retrieved 2024-06-19

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v t e 2021 in space
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Space probe and telescope launches	Tiangong space station Tianhe (April 2021) Lucy (Oct 2021) DART / LICIACube (Nov 2021) James Webb Space Telescope (Dec 2021)
Impact events	Winchcombe meteorite
Selected NEOs	Asteroid close approaches 2021 AV7 2020 XR 2016 DV1 2021 DW1 99942 Apophis (231937) 2001 FO32 2021 GW4 2021 PH27 2016 AJ193 2021 SG 2021 TP21 2021 UA1 2019 XS 3361 Orpheus 1994 WR12 4660 Nereus (163899) 2003 SD220 2018 AH
Exoplanets	Alpha Centauri Ab (unconfirmed) COCONUTS-2b Gliese 486 HD 108236 f HD 110082 b Kepler-1704b KOI-5Ab L 98-59 e f? Lalande 21185 c Lambda Serpentis b NGTS-13b NGTS-14Ab OGLE-2019-BLG-0960Lb PDS 70c circumplanetary disk TIC 172900988 b TOI-178 b c d e f g TOI-755 b c Vega b (unconfirmed) YSES 2 b
Discoveries	QSO J0313−1806 (distant quasar) ID2299 (elliptical galaxy) TIC 168789840 sextuple system V723 Mon black hole candidate 2018 AG37 (TNO) 2021 DR15 (TNO) ALESS 073.1 (spiral galaxy) PJ352–15 astrophysical jet 2MASS J0348−6022 (rapidly-rotating brown dwarf) ZTF J1901+1458 (massive white dwarf) WISE 1534–1043 (brown dwarf) Andy's object (radio source)
Comets	C/2021 A1 (Leonard) C/2021 J1 (Maury-Attard) (248370) 2005 QN173 8P/Tuttle C/2014 OG₃₉₂ (PanSTARRS) C/2014 UN₂₇₁ (Bernardinelli-Bernstein) C/2021 T4 (Lemmon) P/2021 U3 (Attard-Maury)
Space exploration	Hope Mars mission (Mars orbit insertion: Feb 2021) Mars 2020 (Mars orbit insertion: Feb 2021; Perseverance Mars landing: Feb 2021) Tianwen-1 (Mars orbit insertion: Feb 2021; Zhurong rover Mars landing: May 2021)