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JPL Small-Body Database Browser
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509 Iolanda (A903 HD)
Classification: Main-belt Asteroid          SPK-ID: 2000509
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09545650496937788 3.467e-08  
a 3.064082398499452 1.1457e-08 au
q 2.771595801800506 1.078e-07 au
i 15.40821048891123 4.4178e-06 deg
node 217.5394214132352 1.519e-05 deg
peri 157.5796974138751 2.8774e-05 deg
M 73.99414429485125 2.3822e-05 deg
tp 2458197.834947760728
(2018-Mar-20.33494776)
0.00012955 TDB
period 1959.066088101576
5.36
1.0988e-05
3.008e-08
d
yr
n .1837610288833371 1.0306e-09 deg/d
Q 3.356568995198398 1.255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2565  
   data-arc span      42582 days (116.58 yr)  
   first obs. used      1903-04-28  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46637  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:08:27  

Additional Information
 Earth MOID = 1.77973 au 
 Jupiter MOID = 2.10543 au 
 T_jup = 3.171 
[ 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 8.5   n/a MPO384748  
diameter diameter 51.892 km 0.718 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.306 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Koff, R.A.; Brincat, S.F. (2000) Minor Planet Bull. 27, 49-51.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2000) Astron. Astrophys. Suppl. Ser. 145, 255-261.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.253   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.827   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.65, mean=9.40, max.=12.12) deg.
U-B UB 0.410   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.65, mean=9.40, max.=12.12) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

509 Iolanda (A903 HD)          Discovered 1903-Apr-28 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A903 HD = A905 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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