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808 Merxia (A901 TG)
Classification: Main-belt Asteroid          SPK-ID: 2000808
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1288913215776684 3.1555e-08  
a 2.744644328033969 8.6701e-09 au
q 2.390883493333019 8.7815e-08 au
i 4.721890969196066 4.1392e-06 deg
node 180.9956292042502 4.2399e-05 deg
peri 274.7586674629928 4.549e-05 deg
M 313.9413281117 1.6574e-05 deg
tp 2459212.988997120612
(2020-Dec-29.48899712)
7.6769e-05 TDB
period 1660.83900875249
4.55
7.8696e-06
2.155e-08
d
yr
n .216757914585838 1.0271e-09 deg/d
Q 3.098405162734918 9.7875e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3249  
   data-arc span      43484 days (119.05 yr)  
   first obs. used      1901-10-11  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:35  

Additional Information
 Earth MOID = 1.4133 au 
 Jupiter MOID = 2.07985 au 
 T_jup = 3.331 
[ 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 9.8   n/a MPO458834  
diameter diameter 30.923 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 30.631 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Tollefson, E.; Twarek, A. (2003) Minor Planet Bull. 30, 76-77.]
[Koff, R.A.; Brown, J.; Menke, J. (2003) Minor Planet Bull. 30, 48-49.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Menke, J. (2011) http://menkescientific.com/lightcrv.html]
geometric albedo albedo 0.213   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Sq   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)

808 Merxia (A901 TG)          Discovered 1901-Oct-11 by Carnera, L. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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