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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04757748271174882 3.0704e-08  
a 3.021487936453685 1.456e-08 au
q 2.877733146393302 9.1511e-08 au
i 11.10552686253025 3.4014e-06 deg
node 129.002604412303 2.0917e-05 deg
peri 4.012883491219903 4.7904e-05 deg
M 86.63209067791968 4.2584e-05 deg
tp 2458538.857251188575
(2019-Feb-24.35725119)
0.00022715 TDB
period 1918.358292771423
5.25
1.3866e-05
3.796e-08
d
yr
n .1876604601739508 1.3564e-09 deg/d
Q 3.165242726514068 1.5253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      28977 days (79.33 yr)  
   first obs. used      1941-04-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41201  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:12:18  

Additional Information
 Earth MOID = 1.89229 au 
 Jupiter MOID = 1.86797 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457202.5 (2015-Jun-29.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0489303350567122 3.0677e-08  
q 2.873842083089975 9.1584e-08 au
tp 2456617.619776195671
(2013-Nov-21.11977620)
0.00022236 TDB
node 129.0208598343799 2.0918e-05 deg
peri 3.654856055413893 4.6847e-05 deg
i 11.10538642286049 3.4014e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      28977 days (79.33 yr)  
   first obs. used      1941-04-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41201  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:12:18  

Additional Information
 Jupiter MOID = 1.86797 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.411001016590286E-16 -2.777906864194453E-15 4.952328376548234E-13 -1.483298191534611E-16 9.197510661188738E-14 2.468087379662432E-18
q -2.777906864194453E-15 8.387562189875065E-15 -1.912617292385054E-12 1.621811034180214E-15 -3.46732748226308E-13 4.750727561881664E-17
tp 4.952328376548234E-13 -1.912617292385054E-12 4.944218686397863E-8 -1.771014586278095E-11 9.345541826289556E-9 -5.429344016659326E-12
node -1.483298191534611E-16 1.621811034180214E-15 -1.771014586278095E-11 4.375576551462312E-10 -4.322741874735515E-10 5.050457462747982E-12
peri 9.197510661188738E-14 -3.46732748226308E-13 9.345541826289556E-9 -4.322741874735515E-10 2.19462848557489E-9 -5.998948362427061E-12
i 2.468087379662432E-18 4.750727561881664E-17 -5.429344016659326E-12 5.050457462747982E-12 -5.998948362427061E-12 1.156953900379243E-11

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 11.5   n/a MPO473823  
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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