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JPL Small-Body Database Browser
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197 Arete
Classification: Main-belt Asteroid          SPK-ID: 2000197
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .164435977786857 3.6271e-08  
a 2.740095341019265 8.2004e-09 au
q 2.289525084389551 1.0013e-07 au
i 8.793281644043164 3.9978e-06 deg
node 81.60588480796508 2.7612e-05 deg
peri 245.9374899277013 3.0376e-05 deg
M 325.3898862168115 1.4819e-05 deg
tp 2459159.774945287713
6.8581e-05 TDB
period 1656.711695973349
n .2172979166350928 9.7547e-10 deg/d
Q 3.19066559764898 9.5488e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2980  
   data-arc span      51214 days (140.22 yr)  
   first obs. used      1879-05-29  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43963  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:06:13  

Additional Information
 Earth MOID = 1.2946 au 
 Jupiter MOID = 2.17359 au 
 T_jup = 3.314 
[ 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 9.4   n/a MPO473763 IRAS observations used: 16
diameter diameter 31.729 km 0.449 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 6.6084 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Di Martino, M.; Zappala, V.; De Campos, J.A.; Debehogne, H.; Lagerkvist, C.-I. (1987) Astron. Astrophys. Suppl. Ser. 67, 95-101.]
[Behrend, R. (2005) Observatoire de Geneve web site,]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Behrend, R. (2012) Observatoire de Geneve web site,]
geometric albedo albedo 0.373   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.908   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.91 deg.
U-B UB 0.496   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.91 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   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)

197 Arete          Discovered 1879-May-21 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1934 RE1 = 1950 DY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Feb-19 08:03 UT
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