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341520 Mors-Somnus (2007 TY430)
Classification: TransNeptunian Object          SPK-ID: 2341520
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .266744890864684 1.1939e-05  
a 39.3234813860453 0.0007598 au
q 28.83414363530521 8.8251e-05 au
i 11.27258960108198 2.2779e-05 deg
node 196.6488314640641 5.0074e-05 deg
peri 204.85330223652 0.00081668 deg
M 6.348138376524306 0.00049301 deg
tp 2457808.244928556659
(2017-Feb-23.74492856)
0.11421 TDB
period 90069.21270557684
246.60
2.6104
0.007147
d
yr
n .003996926243563244 1.1584e-07 deg/d
Q 49.81281913678539 0.00096247 au
  Orbit Determination Parameters
   # obs. used (total)      264  
   data-arc span      4865 days (13.32 yr)  
   first obs. used      2007-10-14  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .57361  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 08:21:16  

Additional Information
 Earth MOID = 27.8455 au 
 Jupiter MOID = 23.8648 au 
 T_jup = 5.329 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.83   n/a MPCxxxxx  
rotation period rot_per 9.28 h n/a LCDB (Rev. 2020-October); 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:
[Thirouin, A.; Noll, K.S.; Ortiz, J.L.; Morales, N. (2014) Astron. Astrophys. 563, A3.]

341520 Mors-Somnus           Discovered 2007 Oct. 14 by S. S. Sheppard and C. Trujillo at Mauna Kea.
Mors and Somnus are twin gods of the underworld and offspring of Nox. Mors is the Roman personification of death and Somnus is the Roman personification of sleep. This object is an equal-sized binary in resonance with Neptune.
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 2015-06-02Last Updated: 2015-06-04
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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