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98 Ianthe (A868 HA)
Classification: Main-belt Asteroid          SPK-ID: 2000098
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1872330473961016 3.0597e-08  
a 2.686496957773222 8.0191e-09 au
q 2.183495945548986 8.0811e-08 au
i 15.57684745824595 3.1193e-06 deg
node 353.9043941051202 1.4988e-05 deg
peri 158.6319276322097 1.8892e-05 deg
M 215.2664154173518 1.2673e-05 deg
tp 2459647.113509671459
(2022-Mar-08.61350967)
5.819e-05 TDB
period 1608.340345835894
4.40
7.2012e-06
1.972e-08
d
yr
n .2238332209547968 1.0022e-09 deg/d
Q 3.189497969997459 9.5205e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      54713 days (149.80 yr)  
   first obs. used      1870-10-17  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:09:39  

Additional Information
 Earth MOID = 1.19912 au 
 Jupiter MOID = 1.80982 au 
 T_jup = 3.297 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.9   n/a MPO492749 IRAS observations used: 23
diameter diameter 132.788 km 1.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.479 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Magnusson, P.; Lagerkvist, C.-I. (1991) Astron. Astrophys. Suppl. Ser. 87, 269-275.]
[Pilcher, F. (2008) Minor Planet Bull. 35, 71-72.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.029   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.749   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.51, mean=16.35, max.=21.20) deg.
U-B UB 0.375   0.056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.51, mean=16.35, max.=21.20) deg.
Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

98 Ianthe (A868 HA)          Discovered 1868-Apr-18 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A868 HA = 1931 RK1 = 1949 SE1 = 1975 XO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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