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JPL Small-Body Database Browser
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434 Hungaria (A898 RB)
Classification: Inner Main-belt Asteroid          SPK-ID: 2000434
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 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07383877344468488 3.9047e-08  
a 1.944392258384883 3.3523e-09 au
q 1.800820718930402 7.6158e-08 au
i 22.50907337333102 4.4139e-06 deg
node 175.3048879442563 1.0357e-05 deg
peri 123.8685129005237 2.8774e-05 deg
M 10.04525962417705 2.781e-05 deg
tp 2458972.866689514099
7.6479e-05 TDB
period 990.3170397887321
n .3635199492041458 9.4012e-10 deg/d
Q 2.087963797839364 3.5999e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2587  
   data-arc span      44422 days (121.62 yr)  
   first obs. used      1898-09-11  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37931  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:05:24  

Additional Information
 Earth MOID = .834577 au 
 Jupiter MOID = 3.07265 au 
 T_jup = 3.802 
[ 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 11.2   n/a MPO473767  
diameter diameter 8.934 km 0.748 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 26.521 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Durech, J. (2006) IAU 2006, poster paper.]
[Behrend, R. (2009) Observatoire de Geneve web site,]
[Warner, B.D. (2010) Minor Planet Bull. 37, 24-27.]
[Warner, B.D. (2011) Minor Planet Bull. 38, 142-149.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.726   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.717   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=8.90, mean=18.56, max.=28.25) deg.
U-B UB 0.247   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=8.90, mean=16.94, max.=24.74) deg.
Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xe   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)

434 Hungaria (A898 RB)          Discovered 1898-Sep-11 by Wolf, M. at Heidelberg
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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