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244 Sita (A884 TA)
Classification: Main-belt Asteroid          SPK-ID: 2000244
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1373187181786997 1.6008e-08  
a 2.174233933130377 4.1931e-09 au
q 1.875670916412281 3.6009e-08 au
i 2.84537250511655 6.4969e-07 deg
node 208.9597775314771 4.5112e-06 deg
peri 166.4136716608445 5.7686e-06 deg
M 177.7336391943022 6.5053e-06 deg
tp 2458622.370722075613
(2019-May-18.87072208)
2.0803e-05 TDB
period 1171.002523755511
3.21
3.3875e-06
9.274e-09
d
yr
n .3074288848203739 8.8933e-10 deg/d
Q 2.472796949848473 4.7688e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3162  
   data-arc span      49729 days (136.15 yr)  
   first obs. used      1885-01-09  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42058  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:33:12  

Additional Information
 Earth MOID = .875435 au 
 Jupiter MOID = 2.99159 au 
 T_jup = 3.672 
[ 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 12.04   n/a E2021B10  
diameter diameter 11.077 km 0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 129.51 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W.; Higgins, D. (2009) Minor Planet Bull. 36, 25.]
[Vander Haagen, G. A. (2010) Minor Planet Bull. 37, 44-45.]
geometric albedo albedo 0.256   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sa   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

244 Sita (A884 TA)          Discovered 1884-Oct-14 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A884 TA = 1957 KT = 1976 HY = 1979 FL3 = A900 UA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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