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JPL Small-Body Database Browser
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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 ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1727772424805201 2.8562e-08  
a 2.474842107199355 5.7946e-09 au
q 2.047245712342771 7.0305e-08 au
i 5.101117078672384 3.0257e-06 deg
node 148.439946103573 3.8573e-05 deg
peri 140.0665001298796 3.9978e-05 deg
M 248.4502280453994 1.1447e-05 deg
tp 2459041.141967446656
(2020-Jul-10.64196745)
4.5647e-05 TDB
period 1422.065733539619
3.89
4.9944e-06
1.367e-08
d
yr
n .253152854688324 8.8909e-10 deg/d
Q 2.902438502055939 6.7957e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3386  
   data-arc span      46271 days (126.68 yr)  
   first obs. used      1892-09-01  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4472  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:06:20  

Additional Information
 Earth MOID = 1.03348 au 
 Jupiter MOID = 2.27892 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 8.96   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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. 2019-January); 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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