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2049 Grietje (1973 SH)
Classification: Inner Main-belt Asteroid          SPK-ID: 2002049
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08407317764703888 3.3972e-08  
a 1.949143659258306 5.3855e-09 au
q 1.785272958133883 6.7755e-08 au
i 24.41748468283931 4.7821e-06 deg
node 200.0686723049404 8.6852e-06 deg
peri 141.8606288485158 3.0328e-05 deg
M 84.30713257881277 2.7624e-05 deg
tp 2458767.730529445078
(2019-Oct-11.23052945)
7.6409e-05 TDB
period 993.9492286899459
2.72
4.1195e-06
1.128e-08
d
yr
n .3621915381678906 1.5011e-09 deg/d
Q 2.113014360382729 5.8383e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1570  
   data-arc span      16921 days (46.33 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42669  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:11:35  

Additional Information
 Earth MOID = .807584 au 
 Jupiter MOID = 3.13446 au 
 T_jup = 3.780 
[ 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 15.1   n/a MPO502173  
diameter diameter 2.457 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.910 h n/a LCDB (Rev. 2019-August); 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:
[Warner, B.D. (2016) Minor Planet Bull. 43, 300-304.]
geometric albedo albedo 0.168   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2049 Grietje           Discovered 1973 Sept. 29 by T. Gehrels at Palomar.
Named in honor of Mrs. G. A. M. Haring-Gehrels, an exceptional person.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5282Last Updated: 2007-10-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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