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183 Istria (A878 CD)
Classification: Main-belt Asteroid          SPK-ID: 2000183
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3497691541663898 3.4103e-08  
a 2.792681089442368 9.4992e-09 au
q 1.815887386931639 9.4865e-08 au
i 26.38815597308126 3.479e-06 deg
node 141.904051221783 9.2709e-06 deg
peri 264.0825534599353 1.0598e-05 deg
M 230.8424327171676 8.9028e-06 deg
tp 2459612.072288957202
(2022-Feb-01.57228896)
4.4463e-05 TDB
period 1704.63123962739
4.67
8.6974e-06
2.381e-08
d
yr
n .2111893714201151 1.0775e-09 deg/d
Q 3.769474791953098 1.2822e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3147  
   data-arc span      41901 days (114.72 yr)  
   first obs. used      1906-02-22  
   last obs. used      2020-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36214  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:35  

Additional Information
 Earth MOID = 1.0128 au 
 Jupiter MOID = 2.42728 au 
 T_jup = 3.093 
[ 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 9.6   n/a MPO492750 IRAS observations used: 7
diameter diameter 32.927 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.77 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.227   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.842   0.046 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=3.18, mean=3.66, max.=4.14) deg.
U-B UB 0.359   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=3.18, mean=3.66, max.=4.14) 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)

183 Istria (A878 CD)          Discovered 1878-Feb-08 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A878 CD = 1948 CG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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