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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2636852378353179 1.2744e-05  
a 39.16038131256021 0.00080199 au
q 28.83436685243603 9.2487e-05 au
i 11.28433580428493 2.6414e-05 deg
node 196.6904230409303 5.3444e-05 deg
peri 204.7840095741554 0.00096892 deg
M 4.818000806380566 0.00058107 deg
tp 2457802.565252271410
(2017-Feb-18.06525227)
0.13554 TDB
period 89509.43067738213
245.06
2.7497
0.007528
d
yr
n .004021922575929949 1.2355e-07 deg/d
Q 49.48639577268439 0.0010135 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      4674 days (12.80 yr)  
   first obs. used      2007-10-14  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .58343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 21:30:44  

Additional Information
 Earth MOID = 27.8463 au 
 Jupiter MOID = 23.8627 au 
 T_jup = 5.323 
[ 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 6.6   n/a MPO418759  
rotation period rot_per 9.28 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:
[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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