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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225477009616334 3.7135e-08  
a 2.198731539338844 5.9951e-09 au
q 1.929282044161035 7.9978e-08 au
i 6.192821676647626 3.6974e-06 deg
node 44.25378496576847 4.085e-05 deg
peri 4.260094927671795 4.5462e-05 deg
M 138.7815870114547 1.929e-05 deg
tp 2458741.422418788192
(2019-Sep-14.92241879)
6.3632e-05 TDB
period 1190.849108985979
3.26
4.8705e-06
1.333e-08
d
yr
n .3023053023959887 1.2364e-09 deg/d
Q 2.468181034516652 6.7298e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2290  
   data-arc span      31477 days (86.18 yr)  
   first obs. used      1934-11-15  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46626  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:58:14  

Additional Information
 Earth MOID = .938351 au 
 Jupiter MOID = 2.87411 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 13.03   n/a E2021B10  
diameter diameter 6.631 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.5060 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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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