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JPL Small-Body Database Browser
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1524 Joensuu (1939 SB)
Classification: Main-belt Asteroid          SPK-ID: 2001524
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1221728957540606 4.3397e-08  
a 3.107645231723466 1.534e-08 au
q 2.727975214787512 1.3464e-07 au
i 12.68932269177885 4.5934e-06 deg
node 347.7110351240248 1.831e-05 deg
peri 2.542325801902103 2.4813e-05 deg
M 196.8698434231349 1.835e-05 deg
tp 2459507.228632668537
(2021-Oct-19.72863267)
0.00010477 TDB
period 2000.993038996237
5.48
1.4816e-05
4.056e-08
d
yr
n .1799106708440064 1.3321e-09 deg/d
Q 3.487315248659421 1.7215e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2275  
   data-arc span      32199 days (88.16 yr)  
   first obs. used      1931-03-15  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41407  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:23:49  

Additional Information
 Earth MOID = 1.72101 au 
 Jupiter MOID = 1.93433 au 
 T_jup = 3.171 
[ 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 10.7   n/a MPO347528  
diameter diameter 45.056 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.276 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.064   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1524 Joensuu (1939 SB)          Discovered 1939-Sep-18 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1939 SB = 1931 EL = 1933 QO = 1936 DG = 1958 DH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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