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21304 (1996 XL1)
Classification: Main-belt Asteroid          SPK-ID: 2021304
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07365329499880693 1.6579e-08  
a 2.32697430214647 7.3757e-09 au
q 2.155584977415834 4.0406e-08 au
i 7.64415638288189 8.9915e-07 deg
node 87.79960828092644 4.5351e-06 deg
peri 338.085021385236 1.1848e-05 deg
M 299.7559729884837 1.1879e-05 deg
tp 2459417.468807221804
(2021-Jul-21.96880722)
4.3134e-05 TDB
period 1296.539665001445
3.55
6.1644e-06
1.688e-08
d
yr
n .2776621569842976 1.3201e-09 deg/d
Q 2.498363626877107 7.919e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2082  
   data-arc span      8838 days (24.20 yr)  
   first obs. used      1996-12-02  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44906  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:43:06  

Additional Information
 Earth MOID = 1.17112 au 
 Jupiter MOID = 2.69966 au 
 T_jup = 3.558 
[ 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 14.2   n/a MPO435898  

21304 (1996 XL1)          Discovered 1996-Dec-02 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ 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
2019-Feb-02 14:13 < 00:01 Pallas 0.0335224417387768 0.0335208437293411 0.0335240397826531 12.0467262043795 12.0467259676753 2458517.092353298 0.188737474576649 98.0024201979004 27.572327239713 -37.3765152055164 117608.390827566 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 03:43:45 2021-Apr-13 03:43
2079-Apr-09 16:26 < 00:01 Vesta 0.046820042055081 0.0468190369158294 0.0468210475227506 3.2653504011099 3.26534962283496 2480498.184760384 0.406672222545368 582.439391157808 46.9483118349582 -88.2677042973137 148185.174103494 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 03:43:45 2021-Apr-13 03:43

Alternate Designations
 1996 XL1 = 1998 KG31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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