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335 Roberta (A892 RB)
Classification: Main-belt Asteroid          SPK-ID: 2000335
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .172864827188423 2.0334e-08  
a 2.474595348983661 3.8926e-09 au
q 2.046824851620325 5.0491e-08 au
i 5.102958997613487 3.3834e-07 deg
node 148.4240983938141 7.7355e-06 deg
peri 139.8190293795303 7.9608e-06 deg
M 90.17480564693012 2.944e-06 deg
tp 2459040.346325365591
(2020-Jul-09.84632537)
1.1382e-05 TDB
period 1421.853054725737
3.89
3.3549e-06
9.185e-09
d
yr
n .2531907209422853 5.9741e-10 deg/d
Q 2.902365846346997 4.5655e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3955  
   data-arc span      47060 days (128.84 yr)  
   first obs. used      1892-09-01  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42468  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:15:42  

Additional Information
 Earth MOID = 1.03339 au 
 Jupiter MOID = 2.27743 au 
 T_jup = 3.456 
[ 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 9.09   n/a MPCxxxxx IRAS observations used: 17
diameter diameter 97.109 km 0.850 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.054 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Behrend, R. (2004) 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]
[Warner, B.D.; Roy, R.; Dyvig, R.; Reddy, V.; et al. (2007) Minor Planet Bull. 34, 99.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Pilcher, F.; Martinez, L. (2015) Minor Planet Bull. 42, 239.]
geometric albedo albedo 0.049   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.624   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.36, mean=6.66, max.=21.17) deg.
U-B UB 0.235   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.36, mean=6.66, max.=21.17) deg.
Tholen spectral type spec_T FP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B B   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)

335 Roberta (A892 RB)          Discovered 1892-Sep-01 by Staus, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A892 RB = 1956 EB1 = 1973 KE = A910 EC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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