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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1210475186883487 3.6474e-08  
a 2.610447013280145 1.1156e-08 au
q 2.294458879655172 9.5208e-08 au
i 13.18487263973217 4.0626e-06 deg
node 218.5654426791949 1.5721e-05 deg
peri 25.93464067799155 2.2874e-05 deg
M 196.1275513568822 1.9211e-05 deg
tp 2459701.752128987014
(2022-May-02.25212899)
8.4736e-05 TDB
period 1540.532093867185
4.22
9.8758e-06
2.704e-08
d
yr
n .2336854918071165 1.4981e-09 deg/d
Q 2.926435146905117 1.2507e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2693  
   data-arc span      30571 days (83.70 yr)  
   first obs. used      1937-02-18  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:56:06  

Additional Information
 Earth MOID = 1.28939 au 
 Jupiter MOID = 2.08561 au 
 T_jup = 3.362 
[ 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-August); 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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