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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 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2089223926332829 2.8433e-08  
a 2.742915108532212 7.3044e-09 au
q 2.169858721267682 7.615e-08 au
i 14.19806484674296 4.0549e-06 deg
node 148.1681906496658 1.0855e-05 deg
peri 228.8328068121311 1.4988e-05 deg
M 120.8690794394973 1.129e-05 deg
tp 2458443.404448483318
(2018-Nov-20.90444848)
5.1158e-05 TDB
period 1659.269678200832
4.54
6.628e-06
1.815e-08
d
yr
n .2169629233448975 8.6667e-10 deg/d
Q 3.315971495796743 8.8305e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3020  
   data-arc span      51653 days (141.42 yr)  
   first obs. used      1879-01-20  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46003  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:36  

Additional Information
 Earth MOID = 1.19626 au 
 Jupiter MOID = 2.22367 au 
 T_jup = 3.274 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454597.5 (2008-May-11.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2079858750442333 2.8093e-08  
q 2.172282197296072 7.5175e-08 au
tp 2455116.909796923929
(2009-Oct-12.40979692)
4.8273e-05 TDB
node 148.3393313711718 1.0836e-05 deg
peri 227.8615049398649 1.5142e-05 deg
i 14.20664111339641 4.0639e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3020  
   data-arc span      51653 days (141.42 yr)  
   first obs. used      1879-01-20  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46003  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:36  

Additional Information
 Jupiter MOID = 2.22367 au 
 T_jup = 3.274 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.891899226092016E-16 -2.106419998039646E-15 -4.435947474843886E-13 -3.305210298643303E-16 -6.688020328709333E-14 -1.22107143045687E-15
q -2.106419998039646E-15 5.651332397368249E-15 1.272779441512335E-12 1.334523504101327E-15 1.943555208910394E-13 3.411465322678963E-15
tp -4.435947474843886E-13 1.272779441512335E-12 2.330295844210748E-9 4.60199961261741E-13 5.134785643628239E-10 5.852640340000429E-12
node -3.305210298643303E-16 1.334523504101327E-15 4.60199961261741E-13 1.174158809353848E-10 -1.134383396120262E-10 -1.884472176892753E-11
peri -6.688020328709333E-14 1.943555208910394E-13 5.134785643628239E-10 -1.134383396120262E-10 2.292664660187821E-10 1.948044913027617E-11
i -1.22107143045687E-15 3.411465322678963E-15 5.852640340000429E-12 -1.884472176892753E-11 1.948044913027617E-11 1.651510524419389E-11

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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