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173 Ino (A877 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000173
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2091375558641123 2.8417e-08  
a 2.742429403999882 7.2859e-09 au
q 2.168884421317472 7.6109e-08 au
i 14.19921281746233 4.009e-06 deg
node 148.1698707458631 1.0754e-05 deg
peri 228.8137650964082 1.4816e-05 deg
M 164.2775616860359 1.1302e-05 deg
tp 2458443.532281014558
(2018-Nov-21.03228101)
5.0831e-05 TDB
period 1658.828972367948
4.54
6.6106e-06
1.81e-08
d
yr
n .2170205645046738 8.6485e-10 deg/d
Q 3.315974386682291 8.8097e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3154  
   data-arc span      51865 days (142.00 yr)  
   first obs. used      1879-01-20  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45094  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:07  

Additional Information
 Earth MOID = 1.1938 au 
 Jupiter MOID = 2.22461 au 
 T_jup = 3.274 
[ 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 7.97   n/a E2021B10 IRAS observations used: 14
magnitude slope G 0.01   n/a PDS3 (MPC 17257) Fit
diameter diameter 125.821 km 1.489 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.15 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Schober, H.J. (1978) Astron. Astrophys. Suppl. Ser. 34, 377-381.]
[Debehogne, H.; Lagerkvist, C.-I.; Hahn, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 45-48.]
[Erikson, A. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 55-58.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Michalowski, T.; Kaasalainen, M.; Marciniak, A.; Denchev, P.; et al. (2005) Astron. Astrophys. 443, 329-335.]
[Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (2009) Planet. Space Sci. 57, 1-9.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.096   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.705   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.32, mean=11.68, max.=16.35) deg.
U-B UB 0.305   0.012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.48, mean=8.66, max.=16.35) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xk   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)

173 Ino (A877 PA)          Discovered 1877-Aug-01 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A877 PA = A922 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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