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21154 (1993 NS1)
Classification: Main-belt Asteroid          SPK-ID: 2021154
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2649424156815927 3.9271e-08  
a 3.096719098916175 2.3835e-08 au
q 2.276266860161999 1.261e-07 au
i 8.687283245008603 4.7585e-06 deg
node 117.1214017795429 2.8064e-05 deg
peri 270.8659109514277 2.9423e-05 deg
M 352.1949132770295 1.1998e-05 deg
tp 2459439.654528698432
(2021-Aug-13.15452870)
6.6663e-05 TDB
period 1990.449418801962
5.45
2.298e-05
6.292e-08
d
yr
n .1808636766146419 2.0881e-09 deg/d
Q 3.917171337670351 3.015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1022  
   data-arc span      11519 days (31.54 yr)  
   first obs. used      1989-12-30  
   last obs. used      2021-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51744  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:01  

Additional Information
 Earth MOID = 1.30057 au 
 Jupiter MOID = 1.64849 au 
 T_jup = 3.151 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456859.5 (2014-Jul-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2714060297544271 3.8916e-08  
q 2.251353423744242 1.2526e-07 au
tp 2457452.847839970340
(2016-Mar-05.34783997)
5.3545e-05 TDB
node 117.2989897570952 2.8193e-05 deg
peri 271.0173696079706 2.9478e-05 deg
i 8.679197558864045 4.7539e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1022  
   data-arc span      11519 days (31.54 yr)  
   first obs. used      1989-12-30  
   last obs. used      2021-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51744  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:01  

Additional Information
 Jupiter MOID = 1.64849 au 
 T_jup = 3.151 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.514472160226009E-15 -4.831909292003529E-15 -6.867722573983555E-13 6.249927896196271E-15 -8.928728033420977E-14 6.185965438244759E-16
q -4.831909292003529E-15 1.568999389866423E-14 2.446258072787999E-12 -1.963418906148232E-14 3.086300612274523E-13 -1.522427528417793E-15
tp -6.867722573983555E-13 2.446258072787999E-12 2.86703705917209E-9 -5.37324239782603E-12 4.794403640209914E-10 1.18174889033813E-12
node 6.249927896196271E-15 -1.963418906148232E-14 -5.37324239782603E-12 7.948628056939191E-10 -7.864208289016405E-10 1.23446298683186E-11
peri -8.928728033420977E-14 3.086300612274523E-13 4.794403640209914E-10 -7.864208289016405E-10 8.689706169503499E-10 -1.201211559647908E-11
i 6.185965438244759E-16 -1.522427528417793E-15 1.18174889033813E-12 1.23446298683186E-11 -1.201211559647908E-11 2.259917319666886E-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 14.09   n/a MPO636382  
diameter diameter 5.376 km 0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.116   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21154 (1993 NS1)          Discovered 1993-Jul-12 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 NS1 = 1989 YN2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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