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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1567582089640759 2.787e-08  
a 2.547191755029015 6.924e-09 au
q 2.147898537622605 7.2834e-08 au
i 7.027923176824499 3.1792e-06 deg
node 270.8509557649782 3.2796e-05 deg
peri 197.6620684247288 3.5895e-05 deg
M 303.8193181494109 1.5792e-05 deg
tp 2459432.226334740478
(2021-Aug-05.72633474)
6.5445e-05 TDB
period 1484.878391622746
4.07
6.0545e-06
1.658e-08
d
yr
n .242444096453296 9.8855e-10 deg/d
Q 2.946484972435425 8.0094e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2889  
   data-arc span      41770 days (114.36 yr)  
   first obs. used      1906-09-12  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39108  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:57:04  

Additional Information
 Earth MOID = 1.16571 au 
 Jupiter MOID = 2.19623 au 
 T_jup = 3.414 
[ 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 11.49   n/a E2021B10  
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. 2020-October); 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

[ show close-approach data ]
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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