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21848 (1999 TO116)
Classification: Main-belt Asteroid          SPK-ID: 2021848
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1861270593168095 4.8687e-08  
a 2.780246609449307 1.3373e-08 au
q 2.262767483856977 1.319e-07 au
i 13.10270981280439 4.5945e-06 deg
node 191.060350583524 1.7095e-05 deg
peri 203.0052586090642 1.9962e-05 deg
M 188.6830528838234 1.0997e-05 deg
tp 2460006.288810699867
(2023-Mar-02.78881070)
5.4386e-05 TDB
period 1693.25905425594
4.64
1.2217e-05
3.345e-08
d
yr
n .2126077513627665 1.534e-09 deg/d
Q 3.297725735041637 1.5863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      24219 days (66.31 yr)  
   first obs. used      1954-01-31  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52979  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:37  

Additional Information
 Earth MOID = 1.27246 au 
 Jupiter MOID = 2.16665 au 
 T_jup = 3.271 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.35   n/a E2021B10  
diameter diameter 3.914 km 0.723 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.035 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.264   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21848 (1999 TO116)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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