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2976 Lautaro (1974 HR)
Classification: Outer Main-belt Asteroid          SPK-ID: 2002976
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .145171275810738 3.4343e-08  
a 3.337089865505017 1.83e-08 au
q 2.852640272234569 1.198e-07 au
i 9.834375488914093 3.8025e-06 deg
node 206.7190664130497 1.9056e-05 deg
peri 187.8623190325252 2.2423e-05 deg
M 337.910808116223 1.0931e-05 deg
tp 2459137.124192153929
(2020-Oct-14.62419215)
6.736e-05 TDB
period 2226.641401559699
6.10
1.8316e-05
5.015e-08
d
yr
n .1616784812084381 1.3299e-09 deg/d
Q 3.821539458775464 2.0957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2912  
   data-arc span      42755 days (117.06 yr)  
   first obs. used      1903-10-27  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:09:21  

Additional Information
 Earth MOID = 1.85939 au 
 Jupiter MOID = 1.61556 au 
 T_jup = 3.121 
[ 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 10.8   n/a MPO332845  
diameter diameter 46.184 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 17.41 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:
[Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bull. 35, 99-101.]
geometric albedo albedo 0.044   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2976 Lautaro (1974 HR)          Discovered 1974-Apr-22 by Torres, C. at Cerro El Roble
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 HR = 1953 XA = 1957 NB = 1965 XA = 1972 YP1 = 1977 VV = 1983 TR = A903 UG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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