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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 ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1208852668534034 2.1475e-08  
a 2.610731180512299 9.7755e-09 au
q 2.295132245073569 5.6288e-08 au
i 13.18359166916828 1.2402e-06 deg
node 218.5571049625441 3.1958e-06 deg
peri 25.95205580674746 8.8201e-06 deg
M 242.8381534077152 1.0672e-05 deg
tp 2459701.947381943706
(2022-May-02.44738194)
4.7318e-05 TDB
period 1540.783648860835
4.22
8.6538e-06
2.369e-08
d
yr
n .2336473393043617 1.3123e-09 deg/d
Q 2.926330115951028 1.0957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3019  
   data-arc span      30714 days (84.09 yr)  
   first obs. used      1937-02-18  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38763  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:17:57  

Additional Information
 Earth MOID = 1.28871 au 
 Jupiter MOID = 2.08458 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 12.01   n/a E2021B10  
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. 2020-October); 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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