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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1815655697693138 4.5467e-08  
a 3.181046881824444 1.64e-08 au
q 2.603478292263089 1.4339e-07 au
i 1.009792699572949 4.4396e-06 deg
node 191.7618532214574 0.00022956 deg
peri 186.1957752582088 0.00022985 deg
M 130.7216319929071 1.1308e-05 deg
tp 2458644.013882931900
(2019-Jun-09.51388293)
6.3619e-05 TDB
period 2072.304315778545
5.67
1.6025e-05
4.387e-08
d
yr
n .173719659443334 1.3434e-09 deg/d
Q 3.758615471385798 1.9377e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      17430 days (47.72 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:30:00  

Additional Information
 Earth MOID = 1.60465 au 
 Jupiter MOID = 1.70704 au 
 T_jup = 3.173 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457118.5 (2015-Apr-06.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1751010195207818 4.4458e-08  
q 2.631653973215664 1.3816e-07 au
tp 2456557.770502958916
(2013-Sep-22.27050296)
6.7191e-05 TDB
node 192.1535564172532 0.00023498 deg
peri 184.6047882473474 0.00023527 deg
i .9892052570852409 4.4202e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      17430 days (47.72 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:30:00  

Additional Information
 Jupiter MOID = 1.70704 au 
 T_jup = 3.173 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.976538533943515E-15 -6.112482855486735E-15 -9.743602300573844E-14 3.579298853116673E-14 -1.2829291966338E-13 -2.987552887800093E-17
q -6.112482855486735E-15 1.908927419179055E-14 2.770971408305098E-13 -1.112405696657557E-13 4.028226244712499E-13 -1.772839867794528E-16
tp -9.743602300573844E-14 2.770971408305098E-13 4.514586741497896E-9 4.860541594171652E-13 7.880735103685921E-10 -2.186538381286932E-13
node 3.579298853116673E-14 -1.112405696657557E-13 4.860541594171652E-13 5.521721582692373E-8 -5.520995549620636E-8 -1.360858983151532E-10
peri -1.2829291966338E-13 4.028226244712499E-13 7.880735103685921E-10 -5.520995549620636E-8 5.535231592808032E-8 1.359987786733689E-10
i -2.987552887800093E-17 -1.772839867794528E-16 -2.186538381286932E-13 -1.360858983151532E-10 1.359987786733689E-10 1.953808888966739E-11

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 14.16   n/a MPCxxxxx  
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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