Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07374239675963945 3.9483e-08  
a 1.944104209303828 3.6573e-09 au
q 1.80074130535926 7.6981e-08 au
i 22.50883956660048 4.4374e-06 deg
node 175.320954649508 1.0589e-05 deg
peri 124.0319630101876 2.9245e-05 deg
M 224.4458595997103 2.8244e-05 deg
tp 2458973.310404531421
7.7997e-05 TDB
period 990.0969843856193
n .3636007438436845 1.026e-09 deg/d
Q 2.087467113248397 3.927e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2492  
   data-arc span      44070 days (120.66 yr)  
   first obs. used      1898-09-11  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37174  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:07:29  

Additional Information
 Earth MOID = .833343 au 
 Jupiter MOID = 3.07442 au 
 T_jup = 3.803 
[ 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 11.21   n/a PDS3 (MPC 17258)  
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-January); 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Dec-12 13:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin