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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1224475135753808 3.7232e-08  
a 2.199033902118282 6.0345e-09 au
q 1.929767668535932 8.0159e-08 au
i 6.192474210490428 3.6985e-06 deg
node 44.2588547270941 4.1235e-05 deg
peri 4.312782338275429 4.5982e-05 deg
M 78.27355635365315 1.9499e-05 deg
tp 2458741.524380997352
(2019-Sep-15.02438100)		 6.4444e-05 TDB
period 1191.094760275347
3.26		 4.9029e-06
1.342e-08		 d
yr
n .3022429549742778 1.2441e-09 deg/d
Q 2.468300135700634 6.7734e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2186  
   data-arc span      31239 days (85.53 yr)  
   first obs. used      1934-11-15  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:21  

Additional Information
 Earth MOID = .939749 au 
 Jupiter MOID = 2.87341 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] (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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