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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231471923731114 1.1959e-05  
a 39.71715225933359 0.001036 au
q 34.82609646954128 0.00043939 au
i 3.798591066743398 6.046e-05 deg
node 144.7909644621761 0.00084484 deg
peri 104.5933491651498 0.013116 deg
M 32.93063024796569 0.011349 deg
tp 2450637.480269411983
(1997-Jul-07.98026941)
2.5561 TDB
period 91425.12853053195
250.31
3.5773
0.009794
d
yr
n .003937648278829337 1.5407e-07 deg/d
Q 44.60820804912589 0.0011636 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 = 33.8143 au 
 Jupiter MOID = 29.4847 au 
 T_jup = 5.602 
[ 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-August); 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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