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2058 Roka (1938 BH)
Classification: Main-belt Asteroid          SPK-ID: 2002058
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1467276347085132 4.8178e-08  
a 3.128255093634654 2.4323e-08 au
q 2.669253622980783 1.4854e-07 au
i 2.534942998440545 5.3568e-06 deg
node 95.37830192192038 0.00011894 deg
peri 179.9776609390027 0.00012069 deg
M 270.7993185753263 2.3342e-05 deg
tp 2457901.245826986456
(2017-May-27.74582699)
0.00013405 JED
period 2020.931845317274
5.53
2.357e-05
6.453e-08
d
yr
n .1781356461051175 2.0776e-09 deg/d
Q 3.587256564288526 2.7892e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1710  
   data-arc span      28454 days (77.90 yr)  
   first obs. used      1938-01-22  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50142  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:41:58  

Additional Information
 Earth MOID = 1.65134 au 
 Jupiter MOID = 1.5224 au 
 T_jup = 3.196 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4 mag n/a MPO250218  
diameter diameter 21.36 km 3.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 10.04 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Addleman, D.; Covele, B.; Duncan, A.; Johnson, J.; et al. (2005) Minor Planet Bul. 32, 76-78.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1542   0.056 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3

2058 Roka           Discovered 1938 Jan. 22 by G. Kulin at Budapest.
Named in memory of Gedeon Roka, a well-known popularizer of astronomy in Hungary for three decades.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5183Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1938 BH = 1951 NP = 1962 NA = 1963 UM = 1974 SZ1 = 1978 AE = 1985 UL3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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