Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1966425385711708 9.9742e-09  
a 2.247978593877217 5.3272e-09 au
q 1.80593037652355 2.278e-08 au
i 6.844032401938184 6.9439e-07 deg
node 22.46931017131761 2.9545e-06 deg
peri 303.6004641188126 4.4195e-06 deg
M 264.864281345337 4.4086e-06 deg
tp 2459721.832751603624
(2022-May-22.33275160)
1.5765e-05 TDB
period 1231.081156830721
3.37
4.3761e-06
1.198e-08
d
yr
n .2924258876049888 1.0395e-09 deg/d
Q 2.690026811230883 6.3748e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3018  
   data-arc span      32745 days (89.65 yr)  
   first obs. used      1931-11-02  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40361  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:29:59  

Additional Information
 Earth MOID = .804954 au 
 Jupiter MOID = 2.67215 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-26 17:41 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin