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3 Juno (A804 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000003
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2569881357980595 3.0419e-08  
a 2.66801981370837 3.4105e-09 au
q 1.98237037551117 8.1082e-08 au
i 12.99148200874942 3.2159e-06 deg
node 169.8530437296565 1.6572e-05 deg
peri 248.0327674683785 1.7643e-05 deg
M 170.7112455772938 8.1546e-06 deg
tp 2458445.683069197917
(2018-Nov-23.18306920)
3.5262e-05 TDB
period 1591.776184221651
4.36
3.0521e-06
8.356e-09
d
yr
n .2261624489475783 4.3365e-10 deg/d
Q 3.35366925190557 4.287e-09 au
  Orbit Determination Parameters
   # obs. used (total)      7261  
   data-arc span      79040 days (216.40 yr)  
   first obs. used      1804-10-17  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .34041  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:09:26  

Additional Information
 Earth MOID = 1.03316 au 
 Jupiter MOID = 2.19011 au 
 T_jup = 3.299 
[ 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 5.26   n/a E2021B10 IRAS observations used: 23
magnitude slope G 0.32   n/a PDS3 (MPC 17257) Fit
diameter diameter 246.596 km 10.594 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.210 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.]
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.]
[Schroll, A.; Schober, H.J.; Lagerkvist, C.-I. (1981) Astron. Astrophys. 104, 296-299.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Birch, P.V.; Taylor, R.C. (1989) Astron. Astrophys. Suppl. Ser. 81, 409-414.]
[Harris, A.W.; Young, J.W.; Bowell, E.; Martin, L.J.; et al. (1989) Icarus 77, 171-186.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Viikinkoski, M.; Kaasalainen, M.; Durecy, J.; Carry, B.; et al. (2015) Astron. Astrophys. 581, L3.]
[Behrend, R. (2016) 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.214   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.824   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=19; phase (min.=7.79, mean=16.60, max.=25.79) deg.
U-B UB 0.433   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=18; phase (min.=7.79, mean=16.62, max.=25.79) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sk   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)

3 Juno (A804 RA)          Discovered 1804-Sep-01 by Harding, K. at Lilienthal
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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