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225 Henrietta (A882 HA)
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 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2636019994625482 3.0137e-08  
a 3.392071763226708 9.1436e-09 au
q 2.497914864119696 1.0398e-07 au
i 20.85485997730999 3.3034e-06 deg
node 197.0489085327188 9.7767e-06 deg
peri 103.7452809210615 1.1724e-05 deg
M 20.62328278426005 6.8525e-06 deg
tp 2458869.777221416922
(2020-Jan-21.27722142)
4.3079e-05 TDB
period 2281.89666903201
6.25
9.2265e-06
2.526e-08
d
yr
n .1577634977453705 6.3789e-10 deg/d
Q 4.28622866233372 1.1554e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3084  
   data-arc span      45741 days (125.23 yr)  
   first obs. used      1895-05-11  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:12:29  

Additional Information
 Earth MOID = 1.58162 au 
 Jupiter MOID = 1.70145 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455227.5 (2010-Jan-31.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2655547330712497 3.0013e-08  
q 2.488447309605172 1.0336e-07 au
tp 2454314.613381253141
(2007-Aug-02.11338125)
3.4809e-05 TDB
node 197.1319584131433 9.7738e-06 deg
peri 104.4403071244828 1.169e-05 deg
i 20.87278126936694 3.3056e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3084  
   data-arc span      45741 days (125.23 yr)  
   first obs. used      1895-05-11  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:12:29  

Additional Information
 Jupiter MOID = 1.70145 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.007971980985418E-16 -3.096476514510752E-15 9.672244731473711E-14 -5.304863511177244E-15 1.554303162656915E-14 -3.535548626195839E-16
q -3.096476514510752E-15 1.068358638107167E-14 -2.721549389503333E-13 1.679927672785891E-14 -4.03287620391966E-14 -3.264778558263437E-16
tp 9.672244731473711E-14 -2.721549389503333E-13 1.211656877638373E-9 -7.830578931043361E-12 2.402397044040151E-10 -5.728535767443238E-12
node -5.304863511177244E-15 1.679927672785891E-14 -7.830578931043361E-12 9.552734762069122E-11 -9.065788263477758E-11 -5.359071502601448E-12
peri 1.554303162656915E-14 -4.03287620391966E-14 2.402397044040151E-10 -9.065788263477758E-11 1.366598797016689E-10 3.82216688396368E-12
i -3.535548626195839E-16 -3.264778558263437E-16 -5.728535767443238E-12 -5.359071502601448E-12 3.82216688396368E-12 1.092707447674486E-11

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 (A882 HA)          Discovered 1882-Apr-19 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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