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1051 Merope (1925 SA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001051
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1000031922865619 3.3454e-08  
a 3.214630942247781 1.2749e-08 au
q 2.893157585999844 1.0948e-07 au
i 23.50591918440469 3.6806e-06 deg
node 180.6956585304622 8.3307e-06 deg
peri 153.0516191153817 1.7493e-05 deg
M 162.141908610647 1.524e-05 deg
tp 2458052.326336883991
(2017-Oct-25.82633688)
8.9211e-05 TDB
period 2105.20846613094
5.76
1.2524e-05
3.429e-08
d
yr
n .171004442453923 1.0173e-09 deg/d
Q 3.536104298495717 1.4024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2884  
   data-arc span      34593 days (94.71 yr)  
   first obs. used      1925-09-16  
   last obs. used      2020-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4153  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:25:11  

Additional Information
 Earth MOID = 1.90046 au 
 Jupiter MOID = 1.95886 au 
 T_jup = 3.053 
[ 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 10.1   n/a MPO452173  
diameter diameter 60.439 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 27.2 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:
[Carbo, L.; Green, D.; Kragh, K.; Krotz, J.; et al. (2009) Minor Planet Bull. 36, 152-157.]
geometric albedo albedo 0.053   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1051 Merope (1925 SA)          Discovered 1925-Sep-16 by Reinmuth, K. at Heidelberg
Sept. 15, given by some authorities, refers to local mean time.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1925 SA = 1926 XA = 1931 TM3 = 1936 OG = A908 TE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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