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15657 (1125 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2015657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812613814751765 4.7321e-08  
a 3.180964236722687 1.7414e-08 au
q 2.604378264751202 1.508e-07 au
i 1.009491159188943 4.9325e-06 deg
node 191.788567204736 0.00024215 deg
peri 186.1526066373852 0.00024247 deg
M 61.98138486215315 1.1387e-05 deg
tp 2458643.724206068971
(2019-Jun-09.22420607)
6.5125e-05 TDB
period 2072.22355713445
5.67
1.7017e-05
4.659e-08
d
yr
n .1737264296415112 1.4266e-09 deg/d
Q 3.757550208694171 2.0571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1294  
   data-arc span      17010 days (46.57 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51819  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:13:35  

Additional Information
 Earth MOID = 1.60632 au 
 Jupiter MOID = 1.70604 au 
 T_jup = 3.173 
[ 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 14.1   n/a MPO337391  
diameter diameter 5.632 km 1.367 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15657 (1125 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1125 T-2 = 1990 RB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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