Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2636742601786686 3.8111e-05  
a 39.15985035791337 0.0023843 au
q 28.8344057860832 0.0002667 au
i 11.2844476402655 8.3168e-05 deg
node 196.6905349020688 0.00010884 deg
peri 204.7827851029787 0.0022298 deg
M 4.818683483231814 0.0013228 deg
tp 2457802.419879940718
(2017-Feb-17.91987994)
0.31145 TDB
period 89507.61026787123
245.06
8.1746
0.02238
d
yr
n .004022004373959049 3.6733e-07 deg/d
Q 49.48529492974355 0.003013 au
  Orbit Determination Parameters
   # obs. used (total)      97  
   data-arc span      4394 days (12.03 yr)  
   first obs. used      2007-10-14  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .48986  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 22:36:52  

Additional Information
 Earth MOID = 27.8463 au 
 Jupiter MOID = 23.8628 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-30 19:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin