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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1568935595626187 1.7066e-08  
a 2.547665811778226 6.7789e-09 au
q 2.147953453992351 4.5389e-08 au
i 7.027532510699151 1.0555e-06 deg
node 270.8522198242437 7.9256e-06 deg
peri 197.6277483541079 8.4978e-06 deg
M 351.3664954297298 9.2302e-06 deg
tp 2459432.120231531345
(2021-Aug-05.62023153)
3.8143e-05 TDB
period 1485.292936015981
4.07
5.9282e-06
1.623e-08
d
yr
n .2423764304472035 9.6739e-10 deg/d
Q 2.9473781695641 7.8425e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2991  
   data-arc span      41846 days (114.57 yr)  
   first obs. used      1906-09-12  
   last obs. used      2021-04-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:37:06  

Additional Information
 Earth MOID = 1.1662 au 
 Jupiter MOID = 2.1956 au 
 T_jup = 3.414 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

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 ]
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