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446 Aeternitas (1899 ER)
Classification: Main-belt Asteroid          SPK-ID: 2000446
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1270882370010812 3.7807e-08  
a 2.786741028633813 1.059e-08 AU
q 2.432579024326162 1.0767e-07 AU
i 10.626152035783 3.7619e-06 deg
node 42.09254175757512 2.1153e-05 deg
peri 279.6534854884071 2.5775e-05 deg
M 316.1326214999663 1.6264e-05 deg
tp 2457207.553475855814
(2015-Jul-04.05347586)
7.739e-05 JED
period 1699.195480943447
4.65
9.6856e-06
2.652e-08
d
yr
n .2118649702388077 1.2077e-09 deg/d
Q 3.140903032941464 1.1936e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1367  
   data-arc span      42245 days (115.66 yr)  
   first obs. used      1899-10-29  
   last obs. used      2015-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54526  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:34:58  

Additional Information
 Earth MOID = 1.44951 AU 
 T_jup = 3.294 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.90 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
diameter diameter 45.40 km 3.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 15.7413 h n/a LCDB (Rev. 2015-May); Warner et al., 2009 Published Reference List:
[Florczak, M.; Dotto, E.; Barucci, M.A.; Birlan, M.; et al. (1997) Planet. Space Sci. 45, 1423-1435.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Fauerbach, M.; Marks, S.A.; Lucas, M.P. (2008) Minor Planet Bul. 35, 44-46.]
[Lucas, M.P.; Ryan, J.; Fauerbach, M.; Grasso, S. (2011) Minor Planet Bul. 38, 218-220.]
[Lucas, M.P.; Ryan, J.G.; Fauerbach, M. (2012) Minor Planet Bul. 39, 173-176.]
[Klinglesmith III, D.A.; Hanowell, J.; Warren, C.A. (2014) Minor Planet Bul. 41, 206-208.]
geometric albedo albedo 0.2361   0.038 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV 1.026 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.62, mean=7.30, max.=14.52) deg.
U-B UB .615 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.62, mean=7.30, max.=14.52) deg.
Tholen spectral type spec_T A   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B A   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)

446 Aeternitas (1899 ER)          Discovered 1899-Oct-27 by Wolf, M. and Schwassmann, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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