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907 Rhoda (A918 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000907
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631158585662336 1.5292e-08  
a 2.798595061298613 9.7455e-09 au
q 2.342099825095668 4.3635e-08 au
i 19.53216409322506 3.8855e-07 deg
node 42.93106028241589 3.4142e-06 deg
peri 88.50779452246779 7.2739e-06 deg
M 266.7561952159971 8.7186e-06 deg
tp 2459839.420730639338
(2022-Sep-16.92073064)
4.2929e-05 TDB
period 1710.04887026572
4.68
8.9323e-06
2.446e-08
d
yr
n .2105202993082066 1.0996e-09 deg/d
Q 3.255090297501557 1.1335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3653  
   data-arc span      44033 days (120.56 yr)  
   first obs. used      1901-01-18  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:07:51  

Additional Information
 Earth MOID = 1.45181 au 
 Jupiter MOID = 2.06411 au 
 T_jup = 3.223 
[ 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 9.73   n/a E2021B10 IRAS observations used: 12
diameter diameter 82.660 km 0.340 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 22.44 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 85-88.]
[Marciniak, A.; Pilcher, F.; Santana-Ros, T.; Oszkiewicz; Kankiewicz, P. (2014) ACM 2014, Poster 57.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.032   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.709   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.98 deg.
U-B UB 0.269   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.98 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Xk   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)

907 Rhoda (A918 VA)          Discovered 1918-Nov-12 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A918 VA = A901 BA = A913 SC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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