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101591 (1999 BB21)
Classification: Main-belt Asteroid          SPK-ID: 2101591
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1407292702288978 3.632e-08  
a 2.284539592572313 8.173e-09 au
q 1.963038002900588 8.1979e-08 au
i 5.366108539532694 4.2208e-06 deg
node 295.6688339472148 4.3813e-05 deg
peri 127.275801259986 4.7949e-05 deg
M 104.8335041571119 1.8572e-05 deg
tp 2458633.222720857873
(2019-May-29.72272086)		 6.4452e-05 TDB
period 1261.236296108261
3.45		 6.7682e-06
1.853e-08		 d
yr
n .2854342212564255 1.5317e-09 deg/d
Q 2.606041182244038 9.3232e-09 au
   Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      12960 days (35.48 yr)  
   first obs. used      1984-11-27  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5646  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:39  

Additional Information
 Earth MOID = .981885 au 
 Jupiter MOID = 2.67989 au 
 T_jup = 3.584 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457147.5 (2015-May-05.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397103018514527 3.6222e-08  
q 1.96586826650821 8.1681e-08 au
tp 2457370.954207853390
(2015-Dec-14.45420785)		 6.364e-05 TDB
node 295.7780879173925 4.3804e-05 deg
peri 127.0403560089213 4.8033e-05 deg
i 5.365799254274266 4.2214e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      12960 days (35.48 yr)  
   first obs. used      1984-11-27  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5646  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:39  

Additional Information
 Jupiter MOID = 2.67989 au 
 T_jup = 3.584 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.312026815746464E-15 -2.94803628362675E-15 -4.467434412682648E-13 -1.146838191434473E-14 -1.616063103485457E-13 -2.018158443697998E-15
q -2.94803628362675E-15 6.671827335573088E-15 1.110406033788253E-12 2.66972268513455E-14 3.911610668351128E-13 4.608723218265187E-15
tp -4.467434412682648E-13 1.110406033788253E-12 4.050073813626612E-9 2.782575422118986E-11 1.266083659669547E-9 5.420605896389884E-13
node -1.146838191434473E-14 2.66972268513455E-14 2.782575422118986E-11 1.918759054598867E-9 -1.901019620306358E-9 2.387380039378769E-11
peri -1.616063103485457E-13 3.911610668351128E-13 1.266083659669547E-9 -1.901019620306358E-9 2.307198481508482E-9 -2.358710876814581E-11
i -2.018158443697998E-15 4.608723218265187E-15 5.420605896389884E-13 2.387380039378769E-11 -2.358710876814581E-11 1.7820368776533E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO359465  
diameter diameter 2.348 km 0.484 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101591 (1999 BB21)          Discovered 1999-Jan-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 BB21 = 1984 WS3 = 2001 QY324 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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