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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 528 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3541491798243045 1.6379e-08  
a 1.404234014675458 5.9376e-10 au
q .9069256900967543 2.2737e-08 au
i 20.93088060312996 3.6255e-06 deg
node 129.752466630386 5.0408e-06 deg
peri 254.0818905719986 5.82e-06 deg
M 76.28541797780315 3.5396e-06 deg
tp 2458871.705686280855
(2020-Jan-23.20568628)
5.9602e-06 TDB
period 607.7957513765408
1.66
3.855e-07
1.055e-09
d
yr
n .5923042390221864 3.7567e-10 deg/d
Q 1.901542339254162 8.0404e-10 au
  Orbit Determination Parameters
   # obs. used (total)      3330  
   # 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      .39891  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-19 05:27:52  

Additional Information
 Earth MOID = .0798354 au 
 Jupiter MOID = 3.70676 au 
 T_jup = 4.613 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456295.5 (2013-Jan-03.0) TDB
Reference: JPL 528 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3542514656620214 1.6387e-08  
q .9069794505263705 2.2724e-08 au
tp 2456440.240503105223
(2013-May-27.74050311)
5.8226e-06 TDB
node 129.8017975830946 5.0402e-06 deg
peri 254.0128316985125 5.818e-06 deg
i 20.93076272626126 3.6255e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3330  
   # 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      .39891  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-19 05:27:52  

Additional Information
 Jupiter MOID = 3.70676 au 
 T_jup = 4.613 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.685232273588763E-16 -3.723372446576008E-16 -1.785956279136714E-14 -4.002390350059519E-16 -6.546176833545674E-15 -4.192901864664593E-18
q -3.723372446576008E-16 5.163846312907381E-16 2.505367406112729E-14 -4.753007204327823E-17 9.277497213866105E-15 1.465658621273378E-16
tp -1.785956279136714E-14 2.505367406112729E-14 3.390246256987713E-11 4.788693599192914E-14 1.78178159263086E-11 1.503035549220432E-13
node -4.002390350059519E-16 -4.753007204327823E-17 4.788693599192914E-14 2.540385423511859E-11 -2.277653802789284E-11 2.023960043020214E-12
peri -6.546176833545674E-15 9.277497213866105E-15 1.78178159263086E-11 -2.277653802789284E-11 3.384875493494429E-11 -1.425817408072761E-12
i -4.192901864664593E-18 1.465658621273378E-16 1.503035549220432E-13 2.023960043020214E-12 -1.425817408072761E-12 1.314390907086855E-11

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 15.2   n/a MPO492787  
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

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