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 ]  
31037 Mydon (1996 HZ25)
Classification: Jupiter Trojan          SPK-ID: 2031037
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1303730585558946 7.3704e-08  
a 5.246453074614728 9.3308e-08 au
q 4.562456940707229 4.1526e-07 au
i 7.277025194233031 6.5519e-06 deg
node 188.7846825960505 4.0535e-05 deg
peri 28.33357251895133 4.5499e-05 deg
M 11.03670995546354 2.371e-05 deg
tp 2458865.934340329523
(2020-Jan-17.43434033)
0.00028803 TDB
period 4389.318707917156
12.02
0.0001171
3.206e-07
d
yr
n .08201728422013567 2.188e-09 deg/d
Q 5.930449208522228 1.0547e-07 au
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      11937 days (32.68 yr)  
   first obs. used      1986-08-26  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50811  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:24:06  

Additional Information
 Earth MOID = 3.55792 au 
 Jupiter MOID = .622756 au 
 T_jup = 2.967 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456607.5 (2013-Nov-11.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1282566114932679 7.3453e-08  
q 4.582064438211362 4.1747e-07 au
tp 2454462.464540052818
(2007-Dec-27.96454005)
0.0002783 TDB
node 188.7662507710889 4.0521e-05 deg
peri 27.60636990704624 4.5597e-05 deg
i 7.273993853322877 6.5491e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      11937 days (32.68 yr)  
   first obs. used      1986-08-26  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50811  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:24:06  

Additional Information
 Jupiter MOID = .622756 au 
 T_jup = 2.967 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.395330967233231E-15 -3.007014108953754E-14 -7.226163593793816E-12 -1.516690459075166E-14 -4.407512511473923E-13 9.153680691299139E-16
q -3.007014108953754E-14 1.742828746607978E-13 3.519538320499901E-11 8.926504528156782E-14 2.441620755559367E-12 -4.524286678427871E-15
tp -7.226163593793816E-12 3.519538320499901E-11 7.745040266998118E-8 2.437114547251657E-11 5.727381281142825E-9 7.244431351755983E-12
node -1.516690459075166E-14 8.926504528156782E-14 2.437114547251657E-11 1.641939128525045E-9 -1.626647723513648E-9 1.894262240310989E-11
peri -4.407512511473923E-13 2.441620755559367E-12 5.727381281142825E-9 -1.626647723513648E-9 2.079085724494208E-9 -1.81748526152484E-11
i 9.153680691299139E-16 -4.524286678427871E-15 7.244431351755983E-12 1.894262240310989E-11 -1.81748526152484E-11 4.289016043705497E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1   n/a MPO474162  
diameter diameter 19.127 km 0.588 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.077   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

31037 Mydon           Discovered 1996 Apr. 20 by E. W. Elst at the European Southern Observatory.
Mydon, a Paeonian charioteer fighting for the Trojans, was killed by Achilles near the Skamander river.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

Alternate Designations
 1996 HZ25 = 2000 TV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-23 09:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin