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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 
[ 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 11.5   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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1928-Jan-10 17:37 00:02 Jupiter 1.93789438671953 1.9378937780451 1.93789499539595 3.35140657903279 3.21834711862528 2425256.234218384 1.98343924459402 123.6857931992 13.3714909818075 76.8731536921368 3873741.59971851 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54
1975-Mar-07 23:38 < 00:01 Jupiter 1.90486677273618 1.9048663580084 1.90486718746429 3.42014127023942 3.28755861227995 2442479.484787515 0.903036968788945 65.4633120628827 13.4634429681789 76.9780503636441 3879345.20614665 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54
2022-May-04 13:25 < 00:01 Jupiter 1.8786004259618 1.87860007641196 1.87860077551164 3.51634798016209 3.38569697645786 2459704.058952231 0.248988844581348 36.8088052137326 13.2654712719391 75.7206557430935 3963094.61528148 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54
2069-Jul-03 10:55 00:01 Jupiter 1.86633537044191 1.86633504402695 1.86633569685688 3.63001167074209 3.50275598772744 2476930.955140696 1.23437364935842 98.608197217278 14.1339811094747 87.3719066795615 4130351.55408416 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54
2116-Sep-04 17:35 00:02 Jupiter 1.87575600717151 1.87575563932053 1.87575637502398 3.75604267159053 3.63383131300205 2494160.232869840 2.2547148382765 174.44828374833 14.2486003992998 -88.2647212181508 4377897.47610052 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54
2163-Nov-08 03:21 00:03 Jupiter 1.89363096627274 1.89363031586673 1.893631616688 3.86684146438401 3.74938147543147 2511390.639384787 3.2770440323321 246.371980779446 14.5378508959561 -84.4616656390102 4636589.96522218 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 03:54:00 2020-Nov-13 03:54

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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