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2997 Cabrera (1974 MJ)
Classification: Main-belt Asteroid          SPK-ID: 2002997
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964603559237346 4.6316e-08  
a 2.555885385578933 8.5337e-09 au
q 2.053755233027824 1.2145e-07 au
i 7.181707582966374 4.5291e-06 deg
node 355.0218470296792 2.7146e-05 deg
peri 349.9415617643248 2.8458e-05 deg
M 43.48924209532381 9.2896e-06 deg
tp 2458820.202449175447
(2019-Dec-02.70244918)
3.8063e-05 TDB
period 1492.48676614252
4.09
7.4748e-06
2.046e-08
d
yr
n .2412081689209584 1.208e-09 deg/d
Q 3.058015538130042 1.021e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2231  
   data-arc span      25349 days (69.40 yr)  
   first obs. used      1950-08-14  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:36:13  

Additional Information
 Earth MOID = 1.04706 au 
 Jupiter MOID = 2.35821 au 
 T_jup = 3.399 
[ 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 MPO439093  
diameter diameter 8.326 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.31070 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.232   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2997 Cabrera (1974 MJ)          Discovered 1974-Jun-17 by Felix Aguilar Observatory at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 MJ = 1950 TA4 = 1977 EZ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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