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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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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