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49856 (1999 XC99)
Classification: Main-belt Asteroid          SPK-ID: 2049856
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124397522020246 4.3258e-08  
a 2.353466032672928 9.176e-09 au
q 2.088842895143302 1.0053e-07 au
i 4.226414933792968 3.6908e-06 deg
node 292.1785931060056 5.982e-05 deg
peri 239.48685640 6.1962e-05 deg
M 166.086273910413 1.8626e-05 deg
tp 2458392.096687552392
(2018-Sep-30.59668755)
6.6614e-05 TDB
period 1318.743489900202
3.61
7.7125e-06
2.112e-08
d
yr
n .2729871296102047 1.5965e-09 deg/d
Q 2.618089170202554 1.0208e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1522  
   data-arc span      14660 days (40.14 yr)  
   first obs. used      1980-09-04  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:30  

Additional Information
 Earth MOID = 1.09841 au 
 Jupiter MOID = 2.36811 au 
 T_jup = 3.544 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456679.5 (2014-Jan-22.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1121073513039738 4.3206e-08  
q 2.089761353090128 1.0037e-07 au
tp 2457072.370873334391
(2015-Feb-18.87087333)
6.393e-05 TDB
node 292.2311865097782 5.9844e-05 deg
peri 239.51016504131 6.2005e-05 deg
i 4.225427928592998 3.6889e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1522  
   data-arc span      14660 days (40.14 yr)  
   first obs. used      1980-09-04  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .519  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:30  

Additional Information
 Jupiter MOID = 2.36811 au 
 T_jup = 3.544 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.866742255446134E-15 -4.323211705429831E-15 2.592662138034139E-13 2.19096922460072E-15 8.896544521038625E-14 9.493294847597627E-16
q -4.323211705429831E-15 1.007507747494873E-14 -4.392145958283583E-13 -4.491844996545466E-15 -1.693396134491172E-13 -2.058031983028289E-15
tp 2.592662138034139E-13 -4.392145958283583E-13 4.087085069315189E-9 9.26427209129431E-12 1.058907572747207E-9 1.348249967850924E-12
node 2.19096922460072E-15 -4.491844996545466E-15 9.26427209129431E-12 3.581308348444844E-9 -3.568910786456607E-9 4.062925394775957E-11
peri 8.896544521038625E-14 -1.693396134491172E-13 1.058907572747207E-9 -3.568910786456607E-9 3.84457344039097E-9 -4.015735335452019E-11
i 9.493294847597627E-16 -2.058031983028289E-15 1.348249967850924E-12 4.062925394775957E-11 -4.015735335452019E-11 1.360789324180139E-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 14.8   n/a MPO436132  
diameter diameter 3.982 km 0.549 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.027   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49856 (1999 XC99)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XC99 = 1980 RH1 = 1994 NW5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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