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21249 (1995 YX1)
Classification: Main-belt Asteroid          SPK-ID: 2021249
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020049897791442 3.2751e-08  
a 2.303868960964987 6.9724e-09 au
q 2.068862831149266 7.6904e-08 au
i 2.207752187493925 5.117e-06 deg
node 218.3280180335793 8.55e-05 deg
peri 271.0209676095653 8.9518e-05 deg
M 29.77377320587192 2.6025e-05 deg
tp 2459094.862901853663
(2020-Sep-02.36290185)
9.2252e-05 TDB
period 1277.276987022297
3.50
5.7983e-06
1.587e-08
d
yr
n .2818495938294985 1.2795e-09 deg/d
Q 2.538875090780708 7.6836e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1792  
   data-arc span      12175 days (33.33 yr)  
   first obs. used      1987-09-18  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:36  

Additional Information
 Earth MOID = 1.085 au 
 Jupiter MOID = 2.49674 au 
 T_jup = 3.581 
[ 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 14.73   n/a E2021B10  
diameter diameter 2.319 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.520   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21249 (1995 YX1)          Discovered 1995-Dec-21 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 YX1 = 1998 SY140 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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