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1644 Rafita (1935 YA)
Classification: Main-belt Asteroid          SPK-ID: 2001644
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555176014864561 3.2055e-08  
a 2.549759233798288 8.6949e-09 au
q 2.153226793390034 8.1244e-08 au
i 7.026676069587787 4.0332e-06 deg
node 270.8512451010006 3.365e-05 deg
peri 197.4949863111755 3.6784e-05 deg
M 158.5830436806004 1.6093e-05 deg
tp 2457945.409298587897
(2017-Jul-10.90929859)
6.5613e-05 TDB
period 1487.12401423789
4.07
7.6068e-06
2.083e-08
d
yr
n .2420779952131229 1.2383e-09 deg/d
Q 2.946291674206542 1.0047e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2179  
   data-arc span      41322 days (113.13 yr)  
   first obs. used      1906-09-12  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43999  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:07:07  

Additional Information
 Earth MOID = 1.17136 au 
 Jupiter MOID = 2.19802 au 
 T_jup = 3.413 
[ 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 11.82   n/a PDS3 (MPC 17262)  
diameter diameter 13.958 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.344 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Benishek, V. (2018) Minor Planet Bull. 45, 187-189.]
geometric albedo albedo 0.164   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.867   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.42 deg.
U-B UB 0.404   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.42 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1644 Rafita (1935 YA)          Discovered 1935-Dec-16 by Carrasco, R. at Madrid
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1935 YA = 1939 XA = 1941 JB = 1949 JC = 1951 VF = 1955 TS = 1957 GD = 1959 UD = A906 RB = A916 BA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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