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JPL Small-Body Database Browser
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49816 (1999 XZ57)
Classification: Main-belt Asteroid          SPK-ID: 2049816
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08454585840415356 3.333e-08  
a 2.25692558545851 7.4988e-09 au
q 2.066111874481623 7.4402e-08 au
i 4.018144713279632 3.5489e-06 deg
node 220.4000949813181 4.6607e-05 deg
peri 336.0595551571274 5.0702e-05 deg
M 140.0941944969742 2.1271e-05 deg
tp 2458118.561163919093
(2017-Dec-31.06116392)
7.2387e-05 TDB
period 1238.438049571525
3.39
6.1722e-06
1.69e-08
d
yr
n .2906887430699928 1.4487e-09 deg/d
Q 2.447739296435396 8.1327e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1480  
   data-arc span      7820 days (21.41 yr)  
   first obs. used      1998-07-02  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49095  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:14  

Additional Information
 Earth MOID = 1.06495 au 
 Jupiter MOID = 2.51487 au 
 T_jup = 3.615 
[ 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 15.1   n/a MPO502488  
diameter diameter 2.512 km 0.409 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.336   0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49816 (1999 XZ57)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XZ57 = 2001 FR55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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