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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1814053302987656 4.5515e-08  
a 3.181219878747524 1.6392e-08 au
q 2.604129635890331 1.436e-07 au
i 1.009548424438313 4.4523e-06 deg
node 191.7749251677055 0.0002305 deg
peri 186.1810506631551 0.00023079 deg
M 96.69266569345498 1.1253e-05 deg
tp 2458643.852848722409
(2019-Jun-09.35284872)
6.3749e-05 TDB
period 2072.473367269024
5.67
1.6018e-05
4.385e-08
d
yr
n .1737054891442998 1.3426e-09 deg/d
Q 3.758310121604717 1.9366e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1437  
   data-arc span      17344 days (47.49 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:05:14  

Additional Information
 Earth MOID = 1.6047 au 
 Jupiter MOID = 1.70643 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 14.15   n/a E2021B10  
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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