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JPL Small-Body Database Browser
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49931 (1999 XL177)
Classification: Main-belt Asteroid          SPK-ID: 2049931
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05245315403892045 2.8676e-08  
a 2.38484709179458 1.011e-08 au
q 2.259754339929407 6.7474e-08 au
i 3.157600672229365 4.6352e-06 deg
node 335.7163198376082 7.0226e-05 deg
peri 119.7992525619263 9.2014e-05 deg
M 204.7113745853406 5.7687e-05 deg
tp 2459580.765005454084
(2022-Jan-01.26500545)
0.00021589 TDB
period 1345.207360846086
3.68
8.5542e-06
2.342e-08
d
yr
n .2676167336562693 1.7018e-09 deg/d
Q 2.509939843659752 1.0641e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1149  
   data-arc span      7625 days (20.88 yr)  
   first obs. used      1998-08-17  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5159  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:37:17  

Additional Information
 Earth MOID = 1.27854 au 
 Jupiter MOID = 2.5582 au 
 T_jup = 3.532 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456818.5 (2014-Jun-10.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05306248362029623 2.8787e-08  
q 2.257069812865929 6.7854e-08 au
tp 2456891.938659917646
(2014-Aug-22.43865992)
0.00021098 TDB
node 335.8069136961716 7.0298e-05 deg
peri 119.8532389845037 9.1477e-05 deg
i 3.156922193754986 4.633e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1149  
   data-arc span      7625 days (20.88 yr)  
   first obs. used      1998-08-17  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5159  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:37:17  

Additional Information
 Jupiter MOID = 2.5582 au 
 T_jup = 3.532 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.286727296052622E-16 -1.934790245281737E-15 -3.864772741621194E-13 -2.949717739208555E-15 -1.113350173412718E-13 -4.963410456693E-16
q -1.934790245281737E-15 4.604184782410572E-15 9.775025247392548E-13 6.741106002074142E-15 2.793617737681711E-13 1.276090868467103E-15
tp -3.864772741621194E-13 9.775025247392548E-13 4.451461449106268E-8 -5.508712432398101E-11 1.23645520227729E-8 3.353251808143549E-12
node -2.949717739208555E-15 6.741106002074142E-15 -5.508712432398101E-11 4.94177980396886E-9 -4.948991054086336E-9 1.279521116455952E-10
peri -1.113350173412718E-13 2.793617737681711E-13 1.23645520227729E-8 -4.948991054086336E-9 8.368006881377343E-9 -1.268251337092802E-10
i -4.963410456693E-16 1.276090868467103E-15 3.353251808143549E-12 1.279521116455952E-10 -1.268251337092802E-10 2.14646109986207E-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 15.4   n/a MPO324757  

49931 (1999 XL177)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XL177 = 2001 KB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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