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2615 Saito (1951 RJ)
Classification: Main-belt Asteroid          SPK-ID: 2002615
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1513832195246293 1.8528e-08  
a 3.17897705169581 1.7401e-08 au
q 2.697733270815184 5.9788e-08 au
i 4.245774297590068 1.1906e-06 deg
node 322.61672757 8.1167e-06 deg
peri 343.8323638934903 1.0335e-05 deg
M 134.3738199243751 1.0009e-05 deg
tp 2458427.745258205571
(2018-Nov-05.24525821)
5.4468e-05 TDB
period 2070.282047519073
5.67
1.6998e-05
4.654e-08
d
yr
n .173889350212647 1.4277e-09 deg/d
Q 3.660220832576436 2.0035e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2449  
   data-arc span      25394 days (69.52 yr)  
   first obs. used      1951-09-04  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46933  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:01:11  

Additional Information
 Earth MOID = 1.68119 au 
 Jupiter MOID = 1.59894 au 
 T_jup = 3.178 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457003.5 (2014-Dec-12.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1565357960453269 1.8696e-08  
q 2.675910735154206 6.0466e-08 au
tp 2456358.204849780092
(2013-Mar-06.70484978)
4.8623e-05 TDB
node 322.92625390055 8.0893e-06 deg
peri 343.2156612946009 1.0232e-05 deg
i 4.265900037751555 1.1934e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2449  
   data-arc span      25394 days (69.52 yr)  
   first obs. used      1951-09-04  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46933  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:01:11  

Additional Information
 Jupiter MOID = 1.59894 au 
 T_jup = 3.178 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.495374048188047E-16 -1.097526499857057E-15 4.869974038839592E-13 -6.800894203118281E-15 6.709216541248404E-14 5.068125297968385E-16
q -1.097526499857057E-15 3.65616375962752E-15 -1.459167179019929E-12 2.073102716169923E-14 -1.8589693372386E-13 -1.450655970939204E-15
tp 4.869974038839592E-13 -1.459167179019929E-12 2.364199258878135E-9 3.053681241373641E-12 3.137037990292596E-10 1.291168944880711E-12
node -6.800894203118281E-15 2.073102716169923E-14 3.053681241373641E-12 6.543692241811117E-11 -6.305436160935173E-11 -7.729884344021775E-12
peri 6.709216541248404E-14 -1.8589693372386E-13 3.137037990292596E-10 -6.305436160935173E-11 1.046869538864907E-10 7.693677238464452E-12
i 5.068125297968385E-16 -1.450655970939204E-15 1.291168944880711E-12 -7.729884344021775E-12 7.693677238464452E-12 1.424191293640132E-12

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 12.57   n/a E2021B10  
diameter diameter 15.555 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.960 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.088   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2615 Saito (1951 RJ)          Discovered 1951-Sep-04 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1951 RJ = 1955 FC2 = 1967 JS = 1979 OD13 = 1979 QB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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