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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3492596645667644 1.5831e-08  
a 2.794452113601464 8.5001e-09 au
q 1.818462705757131 4.6976e-08 au
i 26.39454099530505 3.4342e-07 deg
node 141.8834224913245 1.7513e-06 deg
peri 264.0039270175342 3.0289e-06 deg
M 273.1510275185306 5.7096e-06 deg
tp 2459612.128672538179
(2022-Feb-01.62867254)		 2.8425e-05 TDB
period 1706.253026141007
4.67		 7.785e-06
2.131e-08		 d
yr
n .2109886367874779 9.6267e-10 deg/d
Q 3.770441521445797 1.1469e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3216  
   data-arc span      41901 days (114.72 yr)  
   first obs. used      1906-02-22  
   last obs. used      2020-11-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36517  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:26:44  

Additional Information
 Earth MOID = 1.01407 au 
 Jupiter MOID = 2.42721 au 
 T_jup = 3.092 
[ 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 9.57   n/a E2021B10 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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