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523 Ada (A904 BA)
Classification: Main-belt Asteroid          SPK-ID: 2000523
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1785290354588393 3.4674e-08  
a 2.965350278419064 1.0197e-08 au
q 2.435949153415308 1.0544e-07 au
i 4.313128644845588 3.7604e-06 deg
node 260.6193158341748 5.486e-05 deg
peri 189.9836690367652 5.5996e-05 deg
M 300.9720190424869 1.0974e-05 deg
tp 2459306.321388988284
(2021-Apr-01.82138899)
5.721e-05 TDB
period 1865.144262939074
5.11
9.6202e-06
2.634e-08
d
yr
n .1930145604033417 9.9554e-10 deg/d
Q 3.49475140342282 1.2017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2953  
   data-arc span      43103 days (118.01 yr)  
   first obs. used      1902-10-25  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45296  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:42  

Additional Information
 Earth MOID = 1.45265 au 
 Jupiter MOID = 1.71806 au 
 T_jup = 3.236 
[ 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 9.9   n/a MPO458830  
diameter diameter 31.89 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 10.03 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Georgilas, S.A.; Wetterer, C.J. (1996) Minor Planet Bull. 23, 41-42.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[LeCrone, C.; Mills, G.; Ditteon, R. (2005) Minor Planet Bull. 32, 62-64.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.2512   0.026 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
SMASSII spectral type spec_B X   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)

523 Ada (A904 BA)          Discovered 1904-Jan-27 by Dugan, R. S. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A904 BA = 1937 NB = 1964 XN = A902 UD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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