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604 Tekmessa (A906 DH)
Classification: Main-belt Asteroid          SPK-ID: 2000604
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1949051748337781 2.0771e-08  
a 3.157311515653801 1.0664e-08 au
q 2.541935162690596 6.895e-08 au
i 4.412226886920626 3.9848e-07 deg
node 11.93977751793726 1.0064e-05 deg
peri 28.45775936253302 9.1381e-06 deg
M 274.3139495410737 6.424e-06 deg
tp 2459688.233068346138
(2022-Apr-18.73306835)
3.7971e-05 TDB
period 2049.15390153005
5.61
1.0381e-05
2.842e-08
d
yr
n .1756822656078673 8.9005e-10 deg/d
Q 3.772687868617006 1.2742e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2918  
   data-arc span      40072 days (109.71 yr)  
   first obs. used      1911-01-31  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45405  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:09:54  

Additional Information
 Earth MOID = 1.55002 au 
 Jupiter MOID = 1.67237 au 
 T_jup = 3.172 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.49   n/a E2021B10  
diameter diameter 64.536 km 0.321 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.5596 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Baker, R.E.; Warner, B.D. (2011) Minor Planet Bull. 38, 195-197.]
[Klinglesmith III, D.A.; Hanowell, J.; Risely, E.; Turk, J.; et al. (2013) Minor Planet Bull. 40, 190-193.]
[Klinglesmith III, D.A. (2017) Minor Planet Bull. 44, 127-129.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.090   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Xc   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)

604 Tekmessa (A906 DH)          Discovered 1906-Feb-16 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A906 DH = A894 BA = A911 BC = A915 WG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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