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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04757748321471583 3.06e-08  
a 3.021487936367226 1.4539e-08 au
q 2.877733144791248 9.1125e-08 au
i 11.10552704944656 3.3861e-06 deg
node 129.0026049960232 2.0892e-05 deg
peri 4.01288316956504 4.7859e-05 deg
M 86.63209048423755 4.256e-05 deg
tp 2458538.857252240477
(2019-Feb-24.35725224)
0.00022702 TDB
period 1918.358292689083
5.25
1.3846e-05
3.791e-08
d
yr
n .1876604601820056 1.3545e-09 deg/d
Q 3.165242727943204 1.5231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2826  
   data-arc span      29019 days (79.45 yr)  
   first obs. used      1941-04-03  
   last obs. used      2020-09-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40997  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:53:52  

Additional Information
 Earth MOID = 1.89229 au 
 Jupiter MOID = 1.86797 au 
 T_jup = 3.216 
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Orbital Elements at Epoch 2457222.5 (2015-Jul-19.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04891868483484092 3.0574e-08  
q 2.873913949230428 9.12e-08 au
tp 2456617.662734270132
(2013-Nov-21.16273427)
0.00022225 TDB
node 129.0209545701314 2.0893e-05 deg
peri 3.665733868287073 4.6811e-05 deg
i 11.10537612224342 3.3861e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2826  
   data-arc span      29019 days (79.45 yr)  
   first obs. used      1941-04-03  
   last obs. used      2020-09-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40997  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:53:52  

Additional Information
 Jupiter MOID = 1.86797 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.347694257036652E-16 -2.756842339958663E-15 4.749303117879687E-13 -1.493413617152177E-16 8.780139771909674E-14 7.496321331531526E-18
q -2.756842339958663E-15 8.317504119719684E-15 -1.844773402416857E-12 1.620359851722829E-15 -3.327784972530194E-13 2.80038174786432E-17
tp 4.749303117879687E-13 -1.844773402416857E-12 4.939554901737685E-8 -1.721931590784976E-11 9.334957521703276E-9 -5.264875471417842E-12
node -1.493413617152177E-16 1.620359851722829E-15 -1.721931590784976E-11 4.364975005876708E-10 -4.311408466444339E-10 4.720983203222858E-12
peri 8.780139771909674E-14 -3.327784972530194E-13 9.334957521703276E-9 -4.311408466444339E-10 2.191254630184296E-9 -5.644274947939295E-12
i 7.496321331531526E-18 2.80038174786432E-17 -5.264875471417842E-12 4.720983203222858E-12 -5.644274947939295E-12 1.146558949520519E-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

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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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