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176 Iduna (A877 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000176
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1710624580722217 1.8779e-08  
a 3.182554968993197 8.8707e-09 au
q 2.638139293047257 5.6985e-08 au
i 22.66984643034806 5.0198e-07 deg
node 200.4818039242899 2.0908e-06 deg
peri 188.5769285453837 4.3002e-06 deg
M 82.5251796775654 5.9487e-06 deg
tp 2458725.114123446948
(2019-Aug-29.61412345)
3.3097e-05 TDB
period 2073.778163558767
5.68
8.6703e-06
2.374e-08
d
yr
n .1735961957388015 7.2579e-10 deg/d
Q 3.726970644939136 1.0388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3518  
   data-arc span      52381 days (143.41 yr)  
   first obs. used      1877-10-15  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41142  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:25:46  

Additional Information
 Earth MOID = 1.64277 au 
 Jupiter MOID = 1.73239 au 
 T_jup = 3.057 
[ 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 8.29   n/a E2021B10  
diameter diameter 106.976 km 1.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.2877 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Hansen, A.T.; Arentoft, T. (1997) Minor Planet Bull. 24, 14.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alton, K.B. (2008) Minor Planet Bull. 35, 53.]
[Krajewski, R. (2008) Minor Planet Bull. 35, 77.]
[Warner, B.D. (2008) Minor Planet Bull. 35, 56-60.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Shevchenko, V.G.; Belksaya, I.N.; Muinon, K.; Penttila, A.; et al. (2016) Plan. Space Sci. 123, 101-116.]
[Oey, J.; Williams, H.; Groom, R. (2017) Minor Planet Bull. 44, 200-204.]
[Benishek, V. (2018) Minor Planet Bull. 45, 82-91.]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.]
[Wang, Y.-B.; Xu, Y.; Fan, C.-B.; Liu, C.-Z. (2018). Astron. Nach. 339, 457-464.]
geometric albedo albedo 0.065   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
Tholen spectral type spec_T G   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979)
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)

176 Iduna (A877 TB)          Discovered 1877-Oct-14 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A877 TB = 1945 RQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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