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JPL Small-Body Database Browser
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3444 Stepanian (1980 RJ2)
Classification: Main-belt Asteroid          SPK-ID: 2003444
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2621598590602804 7.0007e-08  
a 2.558331176824458 9.2518e-09 au
q 1.887639436078637 1.8206e-07 au
i 6.455342507434899 4.0564e-06 deg
node 342.5904885841433 4.8658e-05 deg
peri 83.53252140882296 4.923e-05 deg
M 218.1251867333047 7.6062e-06 deg
tp 2459589.528588866879
(2022-Jan-10.02858887)
3.313e-05 TDB
period 1494.629575959094
4.09
8.1077e-06
2.22e-08
d
yr
n .2408623553223818 1.3066e-09 deg/d
Q 3.229022917570279 1.1677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1810  
   data-arc span      14201 days (38.88 yr)  
   first obs. used      1980-09-07  
   last obs. used      2019-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42537  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:47:26  

Additional Information
 Earth MOID = .914152 au 
 Jupiter MOID = 2.15286 au 
 T_jup = 3.379 
[ 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 12.7   n/a MPO473813  
diameter diameter 6.425 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.47 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.475   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3444 Stepanian (1980 RJ2)          Discovered 1980-Sep-07 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1980 RJ2 = 1972 TD4 = 1984 QP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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