(15760) 1992 QB1

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(15760) 1992 QB₁

Discovery A
Discoverer	David C. Jewitt, Jane X. Luu
Discovery date	August 30, 1992
Alternate designations B	none
Category	Trans-Neptunian object (cubewano)
Orbital elements C
Epoch August 18, 2005 (JD 2453600.5)
Eccentricity (e)	0.0654
Semi-major axis (a)	43.7339 AU
Perihelion (q)	40.8754 AU
Aphelion (Q)	46.5925 AU
Orbital period (P)	289.225 a
Mean orbital speed	4.4990 km/s
Inclination (i)	2.1927°
Longitude of the ascending node (Ω)	359.4575°
Argument of perihelion (ω)	2.1541°
Mean anomaly (M)	14.5829°
Physical characteristics D
Dimensions	435 km [citation needed]
Mass	?×10? kg
Density	? g/cm³
Surface gravity	? m/s²
Escape velocity	? km/s
Rotation period	? d
Spectral class	?
Absolute magnitude	7.2
Albedo (geometric)	~ .07
Mean surface temperature	~? K
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(15760) 1992 QB₁ (also written (15760) 1992 QB1) was the first trans-Neptunian object to be discovered after Pluto and Charon. It was discovered in 1992 and is now classified as a cubewano, an object in the main Kuiper Belt. The term cubewano derives from "Q B one oh".

(15760) 1992 QB₁ was discovered by David C. Jewitt and Jane X. Luu at the Mauna Kea Observatory, Hawaii. The discoverers suggested the name "Smiley" for the object [1], but as there is already an asteroid named 1613 Smiley (named after an American astronomer) the name couldn't be used. The asteroid has received the number 15760, and remains unnamed; it is normally referred to simply as "QB1" (this is ambiguous, as it could refer to any of five other numbered asteroids —(5322) 1986 QB₁, (7026) 1993 QB₁, (31114) 1997 QB₁, (36447) 2000 QB₁, and (52468) 1995 QB₁— and a great number of unnumbered ones).

[edit] External links

• The IAU circular announcing the discovery

Minor planets
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v • d • e  Small Solar System bodies
Vulcanoids | Near-Earth asteroids | Main belt | Jupiter Trojans | Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt · Scattered disc · Oort cloud)
For other objects and regions, see: asteroid groups and families, binary asteroids, asteroid moons and the Solar system For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.

v • d • e  Trans-Neptunian objects
Plutinos : Pluto* | 1993 RO | 1993 RP | 1993 SB | 1993 SC | 1994 TB | 1995 QZ9 | 1996 SZ4 | 1996 TP66 | 38083 Rhadamanthus | 1999 TC36 | 38628 Huya | 28978 Ixion | 2002 VR128 | 2003 VS2 | 90482 Orcus | Unnumbered: 2003 AZ84 Cubewanos: 1992 QB1 | 1994 GV9 | 1994 JQ1 | 1994 VK8 | 1996 TO66 | 58534 Logos| 1998 WW31 | 19521 Chaos | 53311 Deucalion | 20000 Varuna | 2001 KP77 | 2002 AW197 | 50000 Quaoar | 2002 MS4 | 2002 TX300 | 2002 UX25 | 2003 EL61 | 2004 GV9| 2005 FY9 | Unnumbered: | 2003 MW12 | 2003 QW90 | 2005 RN43 Twotinos: 2002 WC19 | 1996 TR66 | Unnumbered: 1998 SM165 | 1997 SZ10 | 1999 RB216 | 2000 JG81 Scattered disc objects: Eris* | 1995 TL8 | 1996 GQ21 | 1996 TL66 | 1999 DE9 | 2000 OO67 | 2000 OM67 | 2001 KC77 | 2001 UR163 | 2002 CY224 | 2002 GX32 | 2002 RP120 | 2002 TC302 | 90377 Sedna** Unnumbered: 2000 CR105 | 2000 EE173 | 2004 XR190 | 2005 TN74 Unclassified Objects : 1994 JS | 1994 JR1 | 1995 DA2 | 1995 SM55 | 1996 TQ66 | 1997 CR29 | 1997 CS29 | 1997 CU29 | 1997 QJ4 | 1998 HJ151 | 1998 HK151 | 1998 HP151 | 1998 HM151 | 1998 KR65 | 1998 SM165 | 1998 SN1651998 US43 | 1998 VG44 | 1998 WW24 | 1998 WA31 | 1998 WU31 | 1998 WA25 | 1999 CP133 | 1999 CL158 | 1999 CC158 | 1999 DF9 | 1999 HT11 | 1999 HB12 | 1999 HC12 | 1999 KR16 | 1999 OY3 Natural satellites : Charon (Pluto) | Hydra (Pluto) | Nix (Pluto) | Dysnomia (Eris) | S/2000 (1998 WW31) 1 | S/2005 (2003 EL61) 1 | S/2005 (2003 EL61) 2 | (58534) Logos I Zoe
* - Also classified as a dwarf planet   ** - Currently classified as an SDO, though may be part of the Inner Oort Cloud