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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 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1290644934774822 2.2166e-08  
a 2.745314071861076 7.4695e-09 au
q 2.390991501739722 6.3218e-08 au
i 4.721633600918011 9.7266e-07 deg
node 180.9902310975449 8.5614e-06 deg
peri 274.7063249055101 9.2164e-06 deg
M 357.3396693545037 5.2785e-06 deg
tp 2459212.777772945837
(2020-Dec-29.27777295)
2.4376e-05 TDB
period 1661.44695885233
4.55
6.7807e-06
1.856e-08
d
yr
n .2166785993870521 8.8431e-10 deg/d
Q 3.09963664198243 8.4335e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3496  
   data-arc span      43629 days (119.45 yr)  
   first obs. used      1901-10-11  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45292  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:54:23  

Additional Information
 Earth MOID = 1.41319 au 
 Jupiter MOID = 2.07874 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456290.5 (2012-Dec-29.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1265896513821005 2.2034e-08  
q 2.398222927328153 6.2652e-08 au
tp 2455885.223287883324
(2011-Nov-19.72328788)
2.4773e-05 TDB
node 181.092261299035 8.544e-06 deg
peri 273.9866935264253 9.2416e-06 deg
i 4.723469677041487 9.7368e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3496  
   data-arc span      43629 days (119.45 yr)  
   first obs. used      1901-10-11  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45292  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:54:23  

Additional Information
 Jupiter MOID = 2.07874 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.855059136983701E-16 -1.373623704857718E-15 -1.066583198718203E-13 3.14135709233432E-14 -2.187508993879046E-14 -2.005535550151076E-15
q -1.373623704857718E-15 3.925269475814553E-15 2.468747496361617E-13 -8.83388020406741E-14 5.575806842996629E-14 5.692214837707018E-15
tp -1.066583198718203E-13 2.468747496361617E-13 6.137174379502789E-10 2.320073094623092E-11 9.905577319885083E-11 8.889926297266401E-12
node 3.14135709233432E-14 -8.83388020406741E-14 2.320073094623092E-11 7.300074305807637E-11 -6.521241240898191E-11 -1.130005660408777E-12
peri -2.187508993879046E-14 5.575806842996629E-14 9.905577319885083E-11 -6.521241240898191E-11 8.540726103049332E-11 3.068361357568838E-12
i -2.005535550151076E-15 5.692214837707018E-15 8.889926297266401E-12 -1.130005660408777E-12 3.068361357568838E-12 9.480520297818586E-13

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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