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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1920264895692994 2.7491e-08  
a 2.219332116002727 6.8059e-09 au
q 1.793161560578318 6.0699e-08 au
i 3.746549406093098 3.4933e-06 deg
node 46.93087719808047 4.9922e-05 deg
peri 251.0894679019124 5.1414e-05 deg
M 238.339707057075 1.5014e-05 deg
tp 2459408.610934332840
(2021-Jul-13.11093433)
5.1329e-05 TDB
period 1207.624384307109
3.31
5.555e-06
1.521e-08
d
yr
n .298105938136182 1.3713e-09 deg/d
Q 2.645502671427136 8.1128e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2283  
   data-arc span      23625 days (64.68 yr)  
   first obs. used      1955-08-23  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45134  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:07:18  

Additional Information
 Earth MOID = .781766 au 
 Jupiter MOID = 2.56665 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 13.8   n/a MPO502195  
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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