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1943 Anteros (1973 EC)
Classification: Amor [NEO]          SPK-ID: 2001943
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 489 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2559951667053227 2.417e-08  
a 1.430462184139215 1.0781e-09 au
q 1.064270778844837 3.4634e-08 au
i 8.706205566935322 2.8395e-06 deg
node 246.3297677858405 1.679e-05 deg
peri 338.3739695841051 1.7824e-05 deg
M 188.2367860457212 6.3893e-06 deg
tp 2459298.654010717795
(2021-Mar-25.15401072)
1.1167e-05 TDB
period 624.9035598913368
1.71
7.0643e-07
1.934e-09
d
yr
n .5760888929206927 6.5125e-10 deg/d
Q 1.796653589433593 1.354e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3453  
   data-arc span      17113 days (46.85 yr)  
   first obs. used      1973-03-10  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-16 05:01:24  

Additional Information
 Earth MOID = .0623068 au 
 Jupiter MOID = 3.19489 au 
 T_jup = 4.640 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455895.5 (2011-Nov-30.0) TDB
Reference: JPL 489 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2558879875706468 2.4164e-08  
q 1.064299486643583 3.4659e-08 au
tp 2456174.286113048407
(2012-Sep-03.78611305)
1.078e-05 TDB
node 246.3668654822841 1.6789e-05 deg
peri 338.3140937135272 1.7827e-05 deg
i 8.70635892354173 2.8395e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3453  
   data-arc span      17113 days (46.85 yr)  
   first obs. used      1973-03-10  
   last obs. used      2020-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-16 05:01:24  

Additional Information
 Jupiter MOID = 3.19489 au 
 T_jup = 4.640 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.838967815863001E-16 -8.372546363871824E-16 9.202010082116713E-15 2.91610001211153E-14 -1.491461589491098E-14 2.074714739019129E-17
q -8.372546363871824E-16 1.201238426567323E-15 -1.288194210666507E-14 -4.16922143368105E-14 2.101831496028238E-14 1.854754102078973E-16
tp 9.202010082116713E-15 -1.288194210666507E-14 1.16204124140324E-10 -1.071568680264515E-11 7.061439746254942E-11 2.300625566995653E-12
node 2.91610001211153E-14 -4.16922143368105E-14 -1.071568680264515E-11 2.818705553768369E-10 -2.818260300951452E-10 8.150993955593233E-12
peri -1.491461589491098E-14 2.101831496028238E-14 7.061439746254942E-11 -2.818260300951452E-10 3.177885110847457E-10 -7.32809246152495E-12
i 2.074714739019129E-17 1.854754102078973E-16 2.300625566995653E-12 8.150993955593233E-12 -7.32809246152495E-12 8.062573825953007E-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 15.6   n/a MPO492773  
diameter diameter 2.3 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 2.86923 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) Icarus 136, 124-153.]
[Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bull. 41, 286-300.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 157-168.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 41-53.]
[Warner, B.D.; Benishek, V.; Harris, A.W. (2017) Minor Planet Bull. 44, 186-188.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 144-152.]
geometric albedo albedo 0.17   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV 0.841   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=15.92, mean=16.51, max.=17.10) deg.
U-B UB 0.444   0.061 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=15.92, mean=16.51, max.=17.10) 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 L   n/a Binzel et al. (2001) Icarus 151, 139-149  

1943 Anteros (1973 EC)          Discovered 1973-Mar-13 by Gibson, J. at El Leoncito
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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