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1798 Watts (1949 GC)
Classification: Main-belt Asteroid          SPK-ID: 2001798
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1222723598972073 3.749e-08  
a 2.198775280690448 6.2916e-09 au
q 1.929925838236782 8.0884e-08 au
i 6.193030105634805 3.9397e-06 deg
node 44.26275568272168 4.2668e-05 deg
peri 4.364714474036175 4.7546e-05 deg
M 317.327666584146 2.0554e-05 deg
tp 2458741.660629545198
6.8076e-05 TDB
period 1190.884645117413
n .3022962815718448 1.2975e-09 deg/d
Q 2.467624723144113 7.0609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1981  
   data-arc span      31065 days (85.05 yr)  
   first obs. used      1934-11-15  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48591  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:06:13  

Additional Information
 Earth MOID = .939414 au 
 Jupiter MOID = 2.87408 au 
 T_jup = 3.649 
[ 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 13.0   n/a MPO395009  
diameter diameter 6.631 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.5060 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pray, D.P.; Pravec, P.; Kucakova, H.; Vrastil, J.; et al. (2017) CBET 4374.]
geometric albedo albedo 0.294   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1798 Watts (1949 GC)          Discovered 1949-Apr-04 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1949 GC = 1934 VS = 1937 RL = 1970 YB = 1973 UD6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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