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JPL Small-Body Database Browser
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5 Astraea
Classification: Main-belt Asteroid          SPK-ID: 2000005
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 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909133447242949 2.3752e-08  
a 2.574037281687803 4.0587e-09 au
q 2.082619214795752 6.0945e-08 au
i 5.367427131421003 2.7417e-06 deg
node 141.5710262979804 2.9157e-05 deg
peri 358.6484198590469 3.0058e-05 deg
M 17.84633930608613 8.5509e-06 deg
tp 2458925.723123355345
(2020-Mar-17.22312336)
3.5771e-05 TDB
period 1508.414422160827
4.13
3.5676e-06
9.768e-09
d
yr
n .2386612025919869 5.6447e-10 deg/d
Q 3.065455348579854 4.8335e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2962  
   data-arc span      63594 days (174.11 yr)  
   first obs. used      1845-12-15  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51387  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:35  

Additional Information
 Earth MOID = 1.09575 au 
 Jupiter MOID = 1.95968 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452007.5 (2001-Apr-08.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926114352345891 2.4048e-08  
q 2.078044083084556 6.1859e-08 au
tp 2451379.030661753254
(1999-Jul-19.53066175)
3.2844e-05 TDB
node 141.6911125304881 2.9107e-05 deg
peri 357.6756137044301 2.9965e-05 deg
i 5.368439871633877 2.7456e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2962  
   data-arc span      63594 days (174.11 yr)  
   first obs. used      1845-12-15  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51387  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:35  

Additional Information
 Jupiter MOID = 1.95968 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.783126407046644E-16 -1.485712943327201E-15 -1.158074070757853E-14 -2.965875998718816E-16 4.756363814016256E-15 6.2429951741939E-18
q -1.485712943327201E-15 3.82657305707818E-15 2.126223910905003E-14 8.970293399582044E-16 -1.348209085445322E-14 -9.322538644205838E-18
tp -1.158074070757853E-14 2.126223910905003E-14 1.078726275445626E-9 8.735743629612217E-13 2.42018919206739E-10 2.598985177767734E-13
node -2.965875998718816E-16 8.970293399582044E-16 8.735743629612217E-13 8.471934700802484E-10 -8.431994279844642E-10 6.320195282216667E-12
peri 4.756363814016256E-15 -1.348209085445322E-14 2.42018919206739E-10 -8.431994279844642E-10 8.979247672040856E-10 -6.235109668731445E-12
i 6.2429951741939E-18 -9.322538644205838E-18 2.598985177767734E-13 6.320195282216667E-12 -6.235109668731445E-12 7.538379393202017E-12

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 6.9   n/a MPO502153 IRAS observations used: 9
diameter diameter 106.699 km 3.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.806 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Taylor, R.C. (1978) Astron. J. 83, 201-204.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planet. Space Sci. 53, 1147-1165.]
[Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bull. 35, 63-66.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.274   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.826   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg.
U-B UB 0.411   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

5 Astraea          Discovered 1845-Dec-08 by Hencke, K. L. at Driesen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1914-Nov-24 12:04 < 00:01 Jupiter 1.96232514397715 1.96232496010231 1.962325327852 2.13628018232439 1.92364457229304 2420461.003115390 0.524656887293191 47.3341651497199 13.5972948917054 88.5422031328678 3866268.05280163 T 113 CATAB v2.0f-lin.ifort 2020-Feb-22 15:14:29 2020-Feb-22 15:14
2010-Mar-02 06:21 < 00:01 Jupiter 1.96102499039137 1.9610247941083 1.96102518667444 2.20119326109022 1.99534328894775 2455257.764618430 0.101801181579183 28.6540023141379 10.0510652073266 76.6594145240515 3953622.58379987 T 113 CATAB v2.0f-lin.ifort 2020-Feb-22 15:14:29 2020-Feb-22 15:14
2092-Aug-23 07:37 < 00:01 Jupiter 1.97835993451435 1.97835968809436 1.97836018093434 2.1454989829245 1.93568548848147 2485382.817164719 0.55642328673106 43.7393356754671 13.4120724298235 89.0106967584428 4046012.55190887 T 113 CATAB v2.0f-lin.ifort 2020-Feb-22 15:14:29 2020-Feb-22 15:14
2187-Nov-27 19:52 00:01 Jupiter 1.95140070234132 1.95140049704725 1.95140090763538 2.13302859537861 1.91877396358791 2520176.327597451 1.11453520432024 83.0443412404646 14.2939774646157 -88.7275368060219 3889881.7315817 T 113 CATAB v2.0f-lin.ifort 2020-Feb-22 15:14:29 2020-Feb-22 15:14

Alternate Designations
 1969 SE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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