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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3487371500330376 1.5812e-08  
a 2.795318870667906 8.6361e-09 au
q 1.820487334277611 4.6954e-08 au
i 26.39966134535062 3.4374e-07 deg
node 141.8773798662461 1.7476e-06 deg
peri 263.9218752732069 2.98e-06 deg
M 314.5217291111986 5.6767e-06 deg
tp 2459612.148729999927
(2022-Feb-01.64873000)
2.7652e-05 TDB
period 1707.046932144692
4.67
7.9109e-06
2.166e-08
d
yr
n .2108905111048733 9.7732e-10 deg/d
Q 3.770150407058201 1.1648e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3349  
   data-arc span      42129 days (115.34 yr)  
   first obs. used      1906-02-22  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35843  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:39:35  

Additional Information
 Earth MOID = 1.01614 au 
 Jupiter MOID = 2.42817 au 
 T_jup = 3.092 
[ 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 9.57   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

Alternate Designations
 A878 CD = 1948 CG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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