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102921 (1999 XH27)
Classification: Main-belt Asteroid          SPK-ID: 2102921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05452411635118214 4.5544e-08  
a 2.578450301620793 1.5184e-08 au
q 2.43786257736948 1.1668e-07 au
i 15.37261874270883 5.1365e-06 deg
node 66.69457814461322 1.6128e-05 deg
peri 38.97820401699212 4.3028e-05 deg
M 345.5983389363778 3.9595e-05 deg
tp 2459260.998785921952
(2021-Feb-15.49878592)
0.00016636 TDB
period 1512.295202316408
4.14
1.3358e-05
3.657e-08
d
yr
n .238048761543766 2.1027e-09 deg/d
Q 2.719038025872106 1.6011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-02-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:15  

Additional Information
 Earth MOID = 1.46749 au 
 Jupiter MOID = 2.4723 au 
 T_jup = 3.374 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456961.5 (2014-Oct-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05311254817874605 4.5403e-08  
q 2.441777976434806 1.1609e-07 au
tp 2456231.811620629067
(2012-Oct-31.31162063)
0.000172 TDB
node 66.72897131377219 1.6137e-05 deg
peri 37.97180343492774 4.4101e-05 deg
i 15.36808528496138 5.1337e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-02-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:15  

Additional Information
 Jupiter MOID = 2.4723 au 
 T_jup = 3.374 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.061402685434764E-15 -5.230213800569332E-15 -1.081151800632301E-12 1.223496120304523E-14 -2.729726036013911E-13 -4.153356156264738E-15
q -5.230213800569332E-15 1.347602512407236E-14 2.540451237911842E-12 -3.163062086462471E-14 6.663712601919705E-13 1.127880420681731E-14
tp -1.081151800632301E-12 2.540451237911842E-12 2.958352618210444E-8 2.006719032902589E-11 7.070707921666534E-9 1.844772871412351E-11
node 1.223496120304523E-14 -3.163062086462471E-14 2.006719032902589E-11 2.604113756475557E-10 -2.460323479926827E-10 9.681905865811941E-12
peri -2.729726036013911E-13 6.663712601919705E-13 7.070707921666534E-9 -2.460323479926827E-10 1.944904859608703E-9 -4.90092015884969E-12
i -4.153356156264738E-15 1.127880420681731E-14 1.844772871412351E-11 9.681905865811941E-12 -4.90092015884969E-12 2.635492581791989E-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 15.18   n/a MPCxxxxx  

102921 (1999 XH27)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1994-Jan-07 11:02 < 00:01 Amphi 0.0291618190020449 0.0291571342131388 0.0291665037911964 4.47926713145344 4.47926708744343 2449359.959983451 0.908153696624708 233.553529764103 36.460491155923 1.04172957042727 18794.0197330317 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 15:44:18 2021-Apr-13 15:44

Alternate Designations
 1999 XH27 = 2001 CM43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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