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 ]  
299 Thora
Classification: Main-belt Asteroid          SPK-ID: 2000299
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06198375327830631 3.3398e-08  
a 2.434183016659675 6.4235e-09 au
q 2.283303217120799 8.2574e-08 au
i 1.606249259854823 3.309e-06 deg
node 241.4824935830938 0.00012423 deg
peri 152.0781263216581 0.00012696 deg
M 42.83536173252 2.5934e-05 deg
tp 2458835.445181681760
(2019-Dec-17.94518168)
9.9931e-05 TDB
period 1387.165467764819
3.80
5.4909e-06
1.503e-08
d
yr
n .2595220313407013 1.0273e-09 deg/d
Q 2.585062816198552 6.8217e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3081  
   data-arc span      31869 days (87.25 yr)  
   first obs. used      1932-11-04  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:31  

Additional Information
 Earth MOID = 1.28927 au 
 Jupiter MOID = 2.65592 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456460.5 (2013-Jun-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06270775075329781 3.3562e-08  
q 2.281015801786739 8.306e-08 au
tp 2456057.314206739474
(2012-May-09.81420674)
9.8718e-05 TDB
node 241.5524805210924 0.00012449 deg
peri 150.9920669495936 0.00012712 deg
i 1.603835699398216 3.3085e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3081  
   data-arc span      31869 days (87.25 yr)  
   first obs. used      1932-11-04  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:31  

Additional Information
 Jupiter MOID = 2.65592 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.126393970366466E-15 -2.780526255571492E-15 -5.452220006237114E-13 -5.618756142641207E-16 -1.403407796469056E-13 -3.019476870712662E-16
q -2.780526255571492E-15 6.899012673978313E-15 1.267092346686713E-12 7.670678070300712E-16 3.274901009769199E-13 7.619791320807453E-16
tp -5.452220006237114E-13 1.267092346686713E-12 9.745226043858693E-9 1.204292576642246E-11 2.54891489548302E-9 4.8823674208807E-14
node -5.618756142641207E-16 7.670678070300712E-16 1.204292576642246E-11 1.549815231550414E-8 -1.548885398441796E-8 -8.548998945240839E-11
peri -1.403407796469056E-13 3.274901009769199E-13 2.54891489548302E-9 -1.548885398441796E-8 1.615854958663357E-8 8.54722925493234E-11
i -3.019476870712662E-16 7.619791320807453E-16 4.8823674208807E-14 -8.548998945240839E-11 8.54722925493234E-11 1.094608936856562E-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 11.3   n/a MPO302059  
diameter diameter 15.757 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 272.9 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Alvarez, E.M.; Pravec, P. (2014) Minor Planet Bull. 41, 209-210.]
[Pilcher, F.; Franco, L.; Pravec, P. (2017) Minor Planet Bull. 44, 270-274.]
geometric albedo albedo 0.251   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

299 Thora          Discovered 1890-Oct-06 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 PC = 1939 PK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-28 22:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin