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1533 Saimaa (1939 BD)
Classification: Main-belt Asteroid          SPK-ID: 2001533
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04017415909428575 1.0096e-08  
a 3.009377226043053 1.1422e-08 au
q 2.888478026589279 3.5151e-08 au
i 10.71484066963964 9.5486e-07 deg
node 156.552104239395 2.4112e-06 deg
peri 9.276077050000005 2.8132e-05 deg
M 214.5149933888721 3.1786e-05 deg
tp 2459971.100185648588
(2023-Jan-26.60018565)		 0.00017039 TDB
period 1906.836128997176
5.22		 1.0856e-05
2.972e-08		 d
yr
n .1887944089822378 1.0748e-09 deg/d
Q 3.130276425496826 1.1881e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3374  
   data-arc span      30867 days (84.51 yr)  
   first obs. used      1936-08-17  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:35:01  

Additional Information
 Earth MOID = 1.89634 au 
 Jupiter MOID = 1.84204 au 
 T_jup = 3.222 
[ 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 10.78   n/a E2021B10 IRAS observations used: 5
diameter diameter 24.298 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.115 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Benishek, V. (2018) Minor Planet Bull. 45, 386-389.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.141   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.790   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.42, mean=4.70, max.=5.35) deg.
U-B UB 0.450   0.079 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.42, mean=4.70, max.=5.35) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1533 Saimaa (1939 BD)          Discovered 1939-Jan-19 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1939 BD = 1934 FA = 1936 QC = 1936 RP 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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