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3491 Fridolin (1984 SM4)
Classification: Main-belt Asteroid          SPK-ID: 2003491
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09628794650880494 3.927e-08  
a 2.793886307633244 1.0859e-08 au
q 2.524868732292172 1.1014e-07 au
i 4.011444681063768 3.3784e-06 deg
node 161.33225889693 5.835e-05 deg
peri 247.1877227725087 6.0616e-05 deg
M 234.6200755266472 1.7952e-05 deg
tp 2459794.569182624178
(2022-Aug-03.06918262)
8.6637e-05 TDB
period 1705.734842663407
4.67
9.9446e-06
2.723e-08
d
yr
n .2110527328139002 1.2305e-09 deg/d
Q 3.062903882974317 1.1905e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2735  
   data-arc span      16884 days (46.23 yr)  
   first obs. used      1974-07-19  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:11:05  

Additional Information
 Earth MOID = 1.5371 au 
 Jupiter MOID = 2.27025 au 
 T_jup = 3.318 
[ 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 12.31   n/a E2021B10  
diameter diameter 8.001 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.898 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.303   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Sq   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)

3491 Fridolin (1984 SM4)          Discovered 1984-Sep-30 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1984 SM4 = 1974 OH1 = 1975 TU5 = 1979 QS5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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