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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965268167454656 1.0211e-08  
a 2.248339707480826 5.5627e-09 au
q 1.806480661807188 2.3075e-08 au
i 6.843348812280025 6.9696e-07 deg
node 22.47123082394602 3.0416e-06 deg
peri 303.5584666144678 4.7088e-06 deg
M 207.5975345971354 4.4168e-06 deg
tp 2459721.791705237024
(2022-May-22.29170524)
1.6046e-05 TDB
period 1231.377808680787
3.37
4.5699e-06
1.251e-08
d
yr
n .2923554391366522 1.085e-09 deg/d
Q 2.690198753154464 6.656e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2721  
   data-arc span      32649 days (89.39 yr)  
   first obs. used      1931-11-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41944  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:05:29  

Additional Information
 Earth MOID = .80433 au 
 Jupiter MOID = 2.67233 au 
 T_jup = 3.594 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.51   n/a MPCxxxxx  
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

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 ]
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