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266901 (2009 WL121)
Classification: Main-belt Asteroid          SPK-ID: 2266901
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03558418861917084 4.6179e-08  
a 2.939610180353352 2.6211e-08 au
q 2.835006537228824 1.3697e-07 au
i 1.140571747932488 5.1394e-06 deg
node 273.4495225494492 0.00023853 deg
peri 38.78482735758664 0.00025059 deg
M 178.006945540025 7.9227e-05 deg
tp 2458290.235746085199
(2018-Jun-20.73574609)
0.00040214 TDB
period 1840.91205214038
5.04
2.4622e-05
6.741e-08
d
yr
n .1955552409912454 2.6155e-09 deg/d
Q 3.044213823477881 2.7144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      8212 days (22.48 yr)  
   first obs. used      1998-09-20  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59862  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 03:17:42  

Additional Information
 Earth MOID = 1.8187 au 
 Jupiter MOID = 2.05112 au 
 T_jup = 3.272 
[ 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 16.36   n/a MPCxxxxx  

266901 (2009 WL121)          Discovered 2009-Nov-20 by Spacewatch at Kitt Peak
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ 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
2023-Jan-25 01:46 00:02 Hygie 0.0332113605003068 0.0332068257404376 0.0332158959029209 1.98541020331194 1.98540961735518 2459969.573770429 1.864961814693 336.272893147142 89.9002676254212 -50.4778977358402 43341.5978257057 T 17 CATAB v2.0f-lin.ifort 2021-Apr-14 03:17:43 2021-Apr-14 03:17
2068-Jan-25 02:54 00:18 Iris 0.0424973427783644 0.0424833013885364 0.0425113912257717 2.78492496132609 2.78492491275277 2476405.620825742 17.6516761924345 1116.03330259526 86.4322675682908 -51.3857102823493 57518.054630803 T 17 CATAB v2.0f-lin.ifort 2021-Apr-14 03:17:43 2021-Apr-14 03:17
2101-Sep-06 15:25 00:03 Psych 0.0428983561907414 0.042852105852996 0.0429446098500157 2.67245916190319 2.672459056367 2488683.142459026 3.34322281241127 2378.70794220213 84.8200647257564 14.5440680903921 19139.0013069346 T 17 CATAB v2.0f-lin.ifort 2021-Apr-14 03:17:43 2021-Apr-14 03:17

Alternate Designations
 2009 WL121 = 2006 BX252 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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