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4163 Saaremaa (1941 HC)
Classification: Main-belt Asteroid          SPK-ID: 2004163
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04660654194847098 1.5992e-08  
a 3.025000296907581 1.2975e-08 au
q 2.884015493675621 5.0665e-08 au
i 11.10536961735518 4.7052e-07 deg
node 129.0003418888787 3.2121e-06 deg
peri 4.9571778799953 1.9031e-05 deg
M 159.9710959331365 2.0959e-05 deg
tp 2458542.563497023076
(2019-Feb-28.06349702)
0.00011052 TDB
period 1921.704288380848
5.26
1.2364e-05
3.385e-08
d
yr
n .1873337131923256 1.2053e-09 deg/d
Q 3.165985100139541 1.358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3162  
   data-arc span      29348 days (80.35 yr)  
   first obs. used      1941-04-03  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39715  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:16:57  

Additional Information
 Earth MOID = 1.89913 au 
 Jupiter MOID = 1.86505 au 
 T_jup = 3.215 
[ 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 11.53   n/a E2021B10  
diameter diameter 19.930 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.086   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4163 Saaremaa (1941 HC)          Discovered 1941-Apr-19 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 HC = 1978 GZ4 = 1979 OA15 = 1982 BB9 = 1988 FC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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