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JPL Small-Body Database Browser
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277011 (2004 YZ21)
Classification: Main-belt Asteroid          SPK-ID: 2277011
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1945853281354944 4.6896e-08  
a 3.064591079446301 3.5631e-08 au
q 2.468266618651134 1.4811e-07 au
i 2.395427355823836 6.2622e-06 deg
node 105.5584116745516 0.00019913 deg
peri 346.0824827428764 0.00020094 deg
M 257.2076631955448 2.7936e-05 deg
tp 2459160.019806570556
(2020-Nov-06.51980657)
0.00015798 TDB
period 1959.553957301124
5.36
3.4174e-05
9.356e-08
d
yr
n .1837152779889893 3.204e-09 deg/d
Q 3.660915540241469 4.2564e-08 au
  Orbit Determination Parameters
   # obs. used (total)      199  
   data-arc span      5866 days (16.06 yr)  
   first obs. used      2003-09-30  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57008  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 05:20:32  

Additional Information
 Earth MOID = 1.48503 au 
 Jupiter MOID = 1.54625 au 
 T_jup = 3.202 
[ 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 16.5   n/a MPO367902  
diameter diameter 2.641 km 0.935 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 21.34 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.]
geometric albedo albedo 0.070   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

277011 (2004 YZ21)          Discovered 2004-Dec-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

[ show close-approach data ]
Alternate Designations
 2004 YZ21 = 2009 SQ339 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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