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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962627176301173 4.0055e-08  
a 2.248190820641722 6.7657e-09 au
q 1.806954780431494 9.1321e-08 au
i 6.843509323874317 4.2337e-06 deg
node 22.48949652060904 3.2507e-05 deg
peri 303.4657109645291 3.3754e-05 deg
M 32.29964133848055 9.8569e-06 deg
tp 2458490.030247409935
(2019-Jan-06.53024741)
3.3562e-05 TDB
period 1231.255496482676
3.37
5.558e-06
1.522e-08
d
yr
n .2923844815543249 1.3198e-09 deg/d
Q 2.68942686085195 8.0935e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2284  
   data-arc span      32177 days (88.10 yr)  
   first obs. used      1931-11-02  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44203  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:12:33  

Additional Information
 Earth MOID = .805832 au 
 Jupiter MOID = 2.66996 au 
 T_jup = 3.594 
[ 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 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

[ show close-approach data ]
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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