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2517 Orma (1968 SB)
Classification: Main-belt Asteroid          SPK-ID: 2002517
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1739874483789264 3.6291e-08  
a 3.184284544964716 1.4906e-08 au
q 2.630259002073855 1.1349e-07 au
i 2.632397363363747 3.2531e-06 deg
node 71.86414365971338 8.3097e-05 deg
peri 299.9567889234098 8.3684e-05 deg
M 75.89332213034297 9.0281e-06 deg
tp 2458762.960472477917
(2019-Oct-06.46047248)
5.2566e-05 TDB
period 2075.46890143282
5.68
1.4573e-05
3.99e-08
d
yr
n .1734547791833791 1.218e-09 deg/d
Q 3.738310087855577 1.75e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2750  
   data-arc span      24067 days (65.89 yr)  
   first obs. used      1955-04-16  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:53:28  

Additional Information
 Earth MOID = 1.63029 au 
 Jupiter MOID = 1.72752 au 
 T_jup = 3.173 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.03   n/a E2021B10  
diameter diameter 20.087 km 0.533 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2517 Orma (1968 SB)          Discovered 1968-Sep-28 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1968 SB = 1972 HE = 1974 WA1 = 1977 FH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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