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101544 (1998 YS21)
Classification: Main-belt Asteroid          SPK-ID: 2101544
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137355834685079 4.3657e-08  
a 3.191699670832586 2.1877e-08 au
q 2.753301098481284 1.4764e-07 au
i 4.762558003231184 4.1198e-06 deg
node 293.9812033765845 5.6446e-05 deg
peri 173.3735708944849 5.8975e-05 deg
M 275.2284197593141 1.7729e-05 deg
tp 2459490.932489849452
(2021-Oct-03.43248985)
0.00010456 TDB
period 2082.722721984428
5.70
2.1413e-05
5.863e-08
d
yr
n .1728506613962469 1.7771e-09 deg/d
Q 3.630098243183888 2.4881e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      8860 days (24.26 yr)  
   first obs. used      1996-08-15  
   last obs. used      2020-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51837  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:29:23  

Additional Information
 Earth MOID = 1.77016 au 
 Jupiter MOID = 1.50114 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457532.5 (2016-May-24.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329540091843719 4.3995e-08  
q 2.771587456965659 1.4814e-07 au
tp 2457406.791140069536
(2016-Jan-19.29114007)
0.00010193 TDB
node 294.3514141012618 5.6526e-05 deg
peri 173.3879929025045 5.9248e-05 deg
i 4.754681167476311 4.1169e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      8860 days (24.26 yr)  
   first obs. used      1996-08-15  
   last obs. used      2020-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51837  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:29:23  

Additional Information
 Jupiter MOID = 1.50114 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.935564058733635E-15 -6.471262662213979E-15 -8.515736972913291E-14 -1.252354684218111E-14 7.651768152696791E-14 -7.491527039904792E-16
q -6.471262662213979E-15 2.194471903186172E-14 6.017666083488312E-13 4.852483908032168E-14 -2.041497478752498E-13 3.395697559258096E-15
tp -8.515736972913291E-14 6.017666083488312E-13 1.038921051768233E-8 4.012788558884624E-12 1.835888841574362E-9 3.477779418658848E-12
node -1.252354684218111E-14 4.852483908032168E-14 4.012788558884624E-12 3.195152062474429E-9 -3.183332212632207E-9 2.345334501818356E-11
peri 7.651768152696791E-14 -2.041497478752498E-13 1.835888841574362E-9 -3.183332212632207E-9 3.51035184286125E-9 -2.280433933757354E-11
i -7.491527039904792E-16 3.395697559258096E-15 3.477779418658848E-12 2.345334501818356E-11 -2.280433933757354E-11 1.694896723182971E-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 14.6   n/a MPO493571  
diameter diameter 5.913 km 0.361 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101544 (1998 YS21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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