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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2089223924202263 2.8437e-08  
a 2.742915108591086 7.3061e-09 au
q 2.169858721898652 7.6164e-08 au
i 14.198064835055 4.0559e-06 deg
node 148.1681906947888 1.0862e-05 deg
peri 228.8328066354251 1.4995e-05 deg
M 120.8690794956062 1.1291e-05 deg
tp 2458443.404448206771
(2018-Nov-20.90444821)
5.116e-05 TDB
period 1659.269678254254
4.54
6.6295e-06
1.815e-08
d
yr
n .2169629233379122 8.6686e-10 deg/d
Q 3.315971495283521 8.8325e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3008  
   data-arc span      51644 days (141.39 yr)  
   first obs. used      1879-01-20  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46085  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:08:23  

Additional Information
 Earth MOID = 1.19626 au 
 Jupiter MOID = 2.22367 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 8.0   n/a MPO502154 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. 2019-August); 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]
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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