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4396 Gressmann (1981 JH)
Classification: Main-belt Asteroid          SPK-ID: 2004396
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 .1920911076833254 1.4987e-08  
a 2.21901458538368 6.4046e-09 au
q 1.792761615711874 3.3176e-08 au
i 3.746758051614053 1.0651e-06 deg
node 46.92739864165583 5.556e-06 deg
peri 251.1363545582363 7.4373e-06 deg
M 297.9262723421191 6.3265e-06 deg
tp 2459408.682388912152
(2021-Jul-13.18238891)
2.1778e-05 TDB
period 1207.36522255337
3.31
5.2271e-06
1.431e-08
d
yr
n .2981699267754804 1.2909e-09 deg/d
Q 2.645267555055486 7.6349e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2380  
   data-arc span      23680 days (64.83 yr)  
   first obs. used      1955-08-23  
   last obs. used      2020-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4539  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:18:01  

Additional Information
 Earth MOID = .779413 au 
 Jupiter MOID = 2.56643 au 
 T_jup = 3.624 
[ 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 13.84   n/a E2021B10  
diameter diameter 4.723 km 0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.288   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B B   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)

4396 Gressmann (1981 JH)          Discovered 1981-May-03 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 JH = 1935 NF = 1955 QR = 1955 RJ = 1975 VR2 = 1978 OA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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