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JPL Small-Body Database Browser
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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181261377834586 4.7441e-08  
a 3.180964238693404 1.7505e-08 au
q 2.604378277945293 1.5129e-07 au
i 1.009491263744408 4.9778e-06 deg
node 191.7885698794007 0.00024234 deg
peri 186.1526046360883 0.00024266 deg
M 61.9813836789184 1.143e-05 deg
tp 2458643.724212548327
(2019-Jun-09.22421255)
6.5349e-05 TDB
period 2072.223559060171
5.67
1.7106e-05
4.683e-08
d
yr
n .1737264294800669 1.4341e-09 deg/d
Q 3.757550199441515 2.0678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1266  
   data-arc span      16935 days (46.37 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:23:51  

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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