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649 Josefa (A907 RO)
Classification: Main-belt Asteroid          SPK-ID: 2000649
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .279271963549966 4.6007e-08  
a 2.54533590567812 9.0558e-09 au
q 1.834494949405161 1.1911e-07 au
i 12.71774100883105 4.6683e-06 deg
node 357.0194153965114 1.5133e-05 deg
peri 349.5062904579726 1.6741e-05 deg
M 253.5855512366112 8.3624e-06 deg
tp 2459438.944050892976
(2021-Aug-12.44405089)
3.4694e-05 TDB
period 1483.255893872328
4.06
7.9157e-06
2.167e-08
d
yr
n .2427093001870028 1.2953e-09 deg/d
Q 3.25617686195108 1.1585e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2615  
   data-arc span      41237 days (112.90 yr)  
   first obs. used      1907-09-12  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41467  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:19:35  

Additional Information
 Earth MOID = .829693 au 
 Jupiter MOID = 2.17657 au 
 T_jup = 3.354 
[ 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 12.7   n/a MPO337247  
diameter diameter 7.726 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.481 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2010) Minor Planet Bull. 37, 45-46.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.345   0.054 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)

649 Josefa (A907 RO)          Discovered 1907-Sep-11 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A907 RO = 1951 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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