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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1290644945400554 2.2251e-08  
a 2.745314070908481 7.6029e-09 au
q 2.390991497992976 6.3544e-08 au
i 4.721633612559698 9.7292e-07 deg
node 180.9902311808362 8.562e-06 deg
peri 274.7063249715915 9.2179e-06 deg
M 357.3396695307401 5.2931e-06 deg
tp 2459212.777772126093
(2020-Dec-29.27777213)
2.4443e-05 TDB
period 1661.446957987574
4.55
6.9018e-06
1.89e-08
d
yr
n .2166785994998298 9.001e-10 deg/d
Q 3.099636643823986 8.5841e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3482  
   data-arc span      43619 days (119.42 yr)  
   first obs. used      1901-10-11  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45227  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:28:54  

Additional Information
 Earth MOID = 1.41319 au 
 Jupiter MOID = 2.07874 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 9.82   n/a E2021B10  
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. 2020-October); 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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