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3909 Gladys (1988 JD1)
Classification: Main-belt Asteroid          SPK-ID: 2003909
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213329321870498 3.7214e-08  
a 2.609627970516756 1.1392e-08 au
q 2.292994156936618 9.6946e-08 au
i 13.18746279288558 4.1476e-06 deg
node 218.5664900235496 1.6421e-05 deg
peri 25.83036158484039 2.3544e-05 deg
M 102.7429414012294 1.901e-05 deg
tp 2458161.043574541101
(2018-Feb-11.54357454)
7.992e-05 TDB
period 1539.80712453411
4.22
1.0082e-05
2.76e-08
d
yr
n .2337955152070899 1.5309e-09 deg/d
Q 2.926261784096894 1.2774e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2384  
   data-arc span      30240 days (82.79 yr)  
   first obs. used      1937-02-18  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40832  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:37:08  

Additional Information
 Earth MOID = 1.28783 au 
 Jupiter MOID = 2.08594 au 
 T_jup = 3.363 
[ 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 11.9   n/a MPO416753  
diameter diameter 10.108 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.83 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Angeli, C.A.; Barucci, M.A. (1996) Planet. Space Sci. 44, 181-186.]
geometric albedo albedo 0.244   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3909 Gladys (1988 JD1)          Discovered 1988-May-15 by Zeigler, K. W. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 JD1 = 1937 DA = 1954 HD = 1972 RQ3 = 1981 WD = 1984 KB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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