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JPL Small-Body Database Browser
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225 Henrietta
Classification: Outer Main-belt Asteroid          SPK-ID: 2000225
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 103 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2636019946002923 3.0956e-08  
a 3.392071765070146 9.6435e-09 au
q 2.497914881970321 1.0724e-07 au
i 20.85485982016901 3.3154e-06 deg
node 197.0489075018886 9.8928e-06 deg
peri 103.7452821369597 1.1826e-05 deg
M 20.62328186087962 7.0768e-06 deg
tp 2458869.777227163300
(2020-Jan-21.27722716)
4.4469e-05 TDB
period 2281.896670892173
6.25
9.731e-06
2.664e-08
d
yr
n .1577634976167644 6.7277e-10 deg/d
Q 4.28622864816997 1.2186e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2908  
   data-arc span      45446 days (124.42 yr)  
   first obs. used      1895-05-11  
   last obs. used      2019-10-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:21:11  

Additional Information
 Earth MOID = 1.58162 au 
 Jupiter MOID = 1.70145 au 
 T_jup = 2.990 
[ 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 8.8   n/a MPO492751 IRAS observations used: 17
diameter diameter 95.934 km 1.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.3556 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Michalowski, T.; Pych, W.; Berthier, J.; Kryszczynska, A.; et al. (2000) Astron. Astrophys. Suppl. Ser. 146, 471-479.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2003) Abstracts of Photometry and Polarimetry of Asteroids: Impact on Collaboration, Kharkiv, 9-10.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]
[Moravec, P.; Cochren, J.; Gerhardt, M.; Harris, A.; et al. (2012) Minor Planet Bull. 39, 213-216.]
[Pilcher, F. (2012) Minor Planet Bull. 39, 171-173.]
[Garceran, A.C. (2013) Posting on CALL web site. http://www.MinorPlanet.info/call.html]
geometric albedo albedo 0.062   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.648   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.40, mean=10.45, max.=16.51) deg.
U-B UB 0.282   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.40, mean=10.45, max.=16.51) deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

225 Henrietta          Discovered 1882-Apr-19 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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