(15810) 1994 JR1

Infobox Planet
bgcolour=#FFFFC0
name=mp|(15810) 1994 JR|1
discovery=yes
discovery_ref=
discoverer=M. J. Irwin, A. Zytkow
discovered=May 12, 1994
mp_name=mp|(15810) 1994 JR|1
alt_names=
mp_category=Plutinocite web
author=Marc W. Buie
date=2006/10/14
title=Orbit Fit and Astrometric record for 15810
publisher=SwRI (Space Science Department)
url=http://www.boulder.swri.edu/~buie/kbo/astrom/15810.html
accessdate=2008-10-02] cite web
date=2008-07-17
title=MPEC 2008-O05 : Distant Minor Planets (2008 Aug. 2.0 TT)
author=Brian G. Marsden
work=IAU Minor Planet Center
publisher=Harvard-Smithsonian Center for Astrophysics
url=http://cfa-www.harvard.edu/iau/mpec/K08/K08O05.html
accessdate=2008-10-02]
orbit_ref=cite web
date=2000-06-25 last obs
title=JPL Small-Body Database Browser: 15810 (1994 JR1)
url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=15810
accessdate=2008-10-02]
epoch=
aphelion=44.507 AU
perihelion=34.756 AU
semimajor=39.631 AU
eccentricity=0.123
period=
avg_speed=
inclination=3.8°
asc_node=144.7°
mean_anomaly=15.6°
arg_peri=102.8°
physical_characteristics=yes
dimensions=127 km
mass=
density=
surface_grav=
escape_velocity=
sidereal_day=
albedo=0.09 (assumed)
single_temperature=
spectral_type=
abs_magnitude=7.7

(15810) 1994 JR₁, also written as 1994 JR1, is a plutino, with 2:3 resonance with Neptune, similar to Pluto. It has a perihelion (closest approach to the Sun) at 34.756 AU and an aphelion (farthest distance from the Sun) at 44.507cite web |title=List of Known Trans-Neptunian Objects|publisher=Johnston's Archive|url=http://www.johnstonsarchive.net/astro/tnoslist.html|accessdate=2007-01-25] , so it is in a relatively eccentric orbit. It is about 127 km in diameter. It was discovered on May 12 1994 by M. J. Irwin and A. Zytkow.

mp|(15810) 1994 JR|1 is currently one of dwarf planet Pluto's closest Neighbors. In 2017, it will be only 2.6 AU from Pluto.cite web
url=http://home.comcast.net/~kpheider/50000.txt
title=50000 Quaoar distance (AU) from Pluto
accessdate=2007-12-18]

References

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1994JR1;orb=1;view=Far Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1994JR1 Ephemeris]