(15760) 1992 QB₁

From Wikipedia, the free encyclopedia

(15760) 1992 QB₁

Discovery
Discovered by	David C. Jewitt, Jane X. Luu
Discovery date	August 30, 1992
Designations
Alternate name	none
Minor planet category	Trans-Neptunian object (cubewano)[1]
Orbital characteristics
Epoch August 18, 2005 (JD 2453600.5)
Aphelion	46.5925 AU
Perihelion	40.8754 AU
Semi-major axis	43.7339 AU
Eccentricity	0.0654
Orbital period	289.225 a
Average orbital speed	4.4990 km/s
Mean anomaly	14.5829°
Inclination	2.1927°
Longitude of ascending node	359.4575°
Argument of perihelion	2.1541°
Physical characteristics
Dimensions	160 km[2]
Mass	?×10? kg
Mean density	? g/cm³
Equatorial surface gravity	? m/s²
Escape velocity	? km/s
Rotation period	? d
Albedo	~0.09
Temperature	~? K
Spectral type	?
Absolute magnitude (H)	7.2

(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 "QB1".

(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 ^[3], but as there is already an asteroid named 1613 Smiley (named after an American astronomer) the name could not 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).

The next three official cubewanos are (15807) 1994 GV₉, (16684) 1994 JQ₁, and (19255) 1994 VK₈.^[4]

[edit] References

1. ^ Marc W. Buie (1999-11-30). "Orbit Fit and Astrometric record for 15760". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/15760.html. Retrieved on 2008-09-28. 
2. ^ Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved on 2008-09-29. 
3. ^ What Lurks in the Outer Solar System? (Science@NASA, 13 September 2001)
4. ^ "MPEC 2008-O05 : Distant Minor Planets (2008 AUG. 2.0 TT)". Minor Planet Center. 2008-07-17. http://cfa-www.harvard.edu/iau/mpec/K08/K08O05.html. Retrieved on 2008-09-29. 

[edit] External links

• Orbital simulation from JPL (Java) / Ephemeris
• The IAU circular announcing the discovery

v • d • e Minor planets navigator (15759) 1992 GM4       ·       (15760) 1992 QB1       ·       15761 Schumi

v • d • e Small Solar System bodies Asteroids (Centaurs · Damocloids · Families · Groups · Moons · Jupiter Trojans · Main belt · Near-Earth · Neptune Trojans) · Comets · Minor planets · Meteoroids · Trans-Neptunians (Detached objects · Hills cloud · Kuiper belt · Oort cloud · Scattered disc objects) Lists: Asteroid groups and families · Asteroid moons · Binary asteroids · Minor planets · See also: Dwarf planet · Meanings of minor planet names · Planet · Pronunciation of asteroid names · Solar System

v • d • e Trans-Neptunian objects Pronunciation guide Objects in italics are unnumbered. Plutinos Pluto1 · 1993 SB · 1993 SC · 1994 JR1 · 1994 TB · 1995 QZ9 · 1996 SZ4 · 1996 TP66 · 1996 TQ66 · 1997 QJ4 · 1998 HK151 · 1998 US43 · 1998 VG44 · 1998 WW24 · 1998 WU31 · 38083 Rhadamanthus · 1999 TC36 · 38628 Huya · 28978 Ixion · 2002 KX14 · 2002 VR128 · 2003 VS2 · 90482 Orcus · 1993 RO · 1993 RP · 2003 AZ84 · 2001 QF298 Cubewanos 1992 QB1 · 1994 GV9 · 1994 JQ1 · 1994 VK8 · 1995 GJ · 1995 SM55 · 1996 TO66 · 58534 Logos · 1997 CS29 · 1997 CU29 · 1998 HJ151 · 1998 HP151 · 1998 HM151 · 1998 KR65 · 19521 Chaos · 1998 WA25 · 1999 DF9 · 1999 HT11 · 53311 Deucalion · 20000 Varuna · 2002 AW197 · 50000 Quaoar · 2002 TX300 · 2002 UX25 · Haumea1 · 2003 OP32 · 2004 GV9 · Makemake1 · 2005 RN43 · 88611 Teharonhiawako · 1998 WW31 · 2002 MS4 · 2003 MW12 · 2003 QW90 Twotinos 1996 TR66 · 1998 SM165 · 1999 RB216 · 2000 JG81 · 2002 WC19 · 1997 SZ10 Other resonant objects 1994 JS · 1995 DA2 · 1998 WA31 · 1999 CP133 · 1999 DE9 · 1999 HB12 · 2001 KC77 · 2001 KP77 · 2002 TC302 · 2003 LG7 Scattered disc objects Eris1, 2 · 1995 TL8 · 1996 GQ21 · 1996 TL66 · 1999 CC158 · 2000 EE173 · 2000 OO67 · 2000 OM67 · 2001 UR163 · 2002 CY224 · 2002 GX32 · 2002 RP120 · 90377 Sedna2 · 2005 RM43 · 2000 CR105 2004 XR190 · 2005 TN74 · 2006 QH181  · 2007 OR10 Unclassified 1997 CR29 · 1998 SN165 · 1999 CL158 · 1999 HC12 · 1999 KR16 · 1999 OY3 · 2003 FY128 · 2004 SB60 · 2004 TY364 · 2005 RR43 · 2006 SQ372 Natural satellites Vanth (Orcus I)  · Charon (Pluto I)  · Nix (Pluto II)  · Hydra (Pluto III)  · Hiʻiaka (Haumea I)  · Namaka (Haumea II)  · Weywot (Quaoar I)  · S/2005 (79360 CS29) 1  · Sawiskera (Teharonhiawako I)  · S/2000 (1998 WW31) 1  · Zoe (Logos I)  · Dysnomia (Eris I) 1 Also classified as a dwarf planet. 2 Although currently classified as an SDO, Eris and Sedna may be part of the inner Oort cloud.