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2243 Lonnrot (1941 SA1)
Classification: Main-belt Asteroid          SPK-ID: 2002243
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964196317040915 3.8568e-08  
a 2.248525297364337 6.5969e-09 au
q 1.806870786578701 8.7642e-08 au
i 6.842806826250105 4.0271e-06 deg
node 22.47898851464032 3.2173e-05 deg
peri 303.5247793380802 3.338e-05 deg
M 149.1686541384453 1.0212e-05 deg
tp 2458490.206349511094
(2019-Jan-06.70634951)
3.4117e-05 TDB
period 1231.530278509495
3.37
5.4197e-06
1.484e-08
d
yr
n .2923192440186719 1.2864e-09 deg/d
Q 2.690179808149974 7.8927e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      32512 days (89.01 yr)  
   first obs. used      1931-11-02  
   last obs. used      2020-11-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42813  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:05:10  

Additional Information
 Earth MOID = .806612 au 
 Jupiter MOID = 2.67228 au 
 T_jup = 3.594 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456410.5 (2013-Apr-28.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962466781848682 3.8549e-08  
q 1.80784178158731 8.7631e-08 au
tp 2456027.907614739680
(2012-Apr-10.40761474)
3.2273e-05 TDB
node 22.55784556564744 3.2149e-05 deg
peri 303.5857192682672 3.3361e-05 deg
i 6.845456899856788 4.0276e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      32512 days (89.01 yr)  
   first obs. used      1931-11-02  
   last obs. used      2020-11-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42813  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:05:10  

Additional Information
 Jupiter MOID = 2.67228 au 
 T_jup = 3.594 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.486000724398225E-15 -3.372010548773951E-15 1.603322777073174E-13 -5.293407206044187E-15 2.830451302463135E-14 -3.744362558576545E-16
q -3.372010548773951E-15 7.679271172346994E-15 -3.612985768833361E-13 1.248488899983151E-14 -6.319610498833956E-14 8.301286995653163E-16
tp 1.603322777073174E-13 -3.612985768833361E-13 1.041542275182508E-9 -4.198645493269285E-12 3.011799687261891E-10 -5.130652952790444E-13
node -5.293407206044187E-15 1.248488899983151E-14 -4.198645493269285E-12 1.033568002037339E-9 -1.026710846508047E-9 -2.340872140283046E-11
peri 2.830451302463135E-14 -6.319610498833956E-14 3.011799687261891E-10 -1.026710846508047E-9 1.112965866071236E-9 2.309334317276567E-11
i -3.744362558576545E-16 8.301286995653163E-16 -5.130652952790444E-13 -2.340872140283046E-11 2.309334317276567E-11 1.622181859337974E-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 12.5   n/a MPO350817  
diameter diameter 8.628 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.180   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2243 Lonnrot (1941 SA1)          Discovered 1941-Sep-25 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1941 SA1 = 1931 VB = 1934 NQ = 1951 QH = 1951 RQ1 = 1951 SF = 1961 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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