Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1566274326281734 3.1714e-08  
a 2.547172150435561 8.3218e-09 au
q 2.148215116050856 8.0718e-08 au
i 7.02793104222469 3.9431e-06 deg
node 270.8507683456379 3.3323e-05 deg
peri 197.6584452491053 3.6388e-05 deg
M 255.3188189599213 1.6062e-05 deg
tp 2459432.269525624892
(2021-Aug-05.76952562)
6.7021e-05 TDB
period 1484.861248990398
4.07
7.2767e-06
1.992e-08
d
yr
n .2424468954555686 1.1881e-09 deg/d
Q 2.946129184820266 9.6252e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2388  
   data-arc span      41600 days (113.89 yr)  
   first obs. used      1906-09-12  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42267  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:09  

Additional Information
 Earth MOID = 1.16617 au 
 Jupiter MOID = 2.19678 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 11.4   n/a MPO492769  
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-August); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-23 09:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin