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JPL Small-Body Database Browser
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15810 Arawn (1994 JR1)
Classification: TransNeptunian Object          SPK-ID: 2015810
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1234649874097923 1.1575e-05  
a 39.687038038043 0.001032 au
q 34.78707838634407 0.00045136 au
i 3.801830941502668 6.0505e-05 deg
node 144.7571427659271 0.00084368 deg
peri 103.8114968250943 0.013145 deg
M 32.00115661872598 0.011317 deg
tp 2450482.769435426215
(1997-Feb-03.26943543)
2.5551 TDB
period 91321.16810854533
250.02
3.5619
0.009752
d
yr
n .003942130915059038 1.5376e-07 deg/d
Q 44.58699768974193 0.0011594 au
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      8002 days (21.91 yr)  
   first obs. used      1994-05-12  
   last obs. used      2016-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .30414  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 05:11:49  

Additional Information
 Earth MOID = 33.7753 au 
 Jupiter MOID = 29.4439 au 
 T_jup = 5.600 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.7   n/a MPO381389  
rotation period rot_per 5.47 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Porter, S.; Spencer, J.R.; Benecchi, S.D; Verbiscer, A.J.; et al. (2016) DPS 48/ESPC 11, 113.09.]

15810 Arawn           Discovered 1994 May 12 by M. J. Irwin and A. Zytkow at La Palma.
The Middle Welsh Pedair Cainc Y Mabinogi (Four Branches of the Mabinogi) describes Arawn as the ruler of the Celtic otherworld, Annwn.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-01-12Last Updated: 2017-01-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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