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3103 Eger (1982 BB)
Classification: Apollo [NEO]          SPK-ID: 2003103
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 529 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3542291473960441 1.6378e-08  
a 1.404144820802101 5.9386e-10 au
q .9067557981088018 2.2735e-08 au
i 20.93109193847681 3.6142e-06 deg
node 129.7526110642535 5.0403e-06 deg
peri 254.0736558956245 5.8172e-06 deg
M 194.7595124302381 3.5541e-06 deg
tp 2459479.452493267611
(2021-Sep-21.95249327)
6.0416e-06 TDB
period 607.73784351092
1.66
3.8555e-07
1.056e-09
d
yr
n .5923606763078453 3.7579e-10 deg/d
Q 1.901533843495401 8.0422e-10 au
  Orbit Determination Parameters
   # obs. used (total)      3345  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      14242 days (38.99 yr)  
   first obs. used      1982-01-21  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39892  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-04 05:52:44  

Additional Information
 Earth MOID = .078152 au 
 Jupiter MOID = 3.70787 au 
 T_jup = 4.613 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.19   n/a E2020-QM5  
diameter diameter 1.5 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 5.7103 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z. (1987) Icarus 70, 566-572.]
[Wisniewski, W.Z. (1991) Icarus 90, 117-122.]
[Velichko, F.P.; Krugly, Yu.N.; Chiornij, V.G. (1992) Astron. Tsirk. 1553, 37-38.]
[De Sanctis, M.C.; Barucci, M.A.; Angeli, C.A.; Fulchignoni, M.; et al. (1994) Planet. Space Sci. 42, 859-864.]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) Icarus 136, 124-153.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Durech, J.; Vokrouhlicky, D.; Baransky, A.R.; Breiter, S.; et al. (2012) Astron. Astrophys. 547, A10.]
[Warner, Brian D. (2014) Minor Planet Bull. 41, 213-224.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 311-319.]
[Vaduvescu, O.; Aznar, A.M.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
[Warner, B.D.; Stephens, R.D (2017) Minor Planet Bull. 44, 220-222.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 423-438.]
geometric albedo albedo 0.64   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV 0.732   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=44.97 deg.
U-B UB 0.235   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=44.97 deg.
SMASSII spectral type spec_B Xe   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)

3103 Eger (1982 BB)          Discovered 1982-Jan-20 by Lovas, M. at Piszkesteto
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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