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277 Elvira (A888 JA)
Classification: Main-belt Asteroid          SPK-ID: 2000277
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09245029229138825 1.3434e-08  
a 2.883413162989392 9.2435e-09 au
q 2.616840773274187 4.3199e-08 au
i 1.162872951302927 3.5093e-07 deg
node 231.2474240603581 1.388e-05 deg
peri 137.0205289775041 1.9083e-05 deg
M 228.786077741245 1.465e-05 deg
tp 2459852.332722851168
(2022-Sep-29.83272285)
7.4208e-05 TDB
period 1788.37562498642
4.90
8.5996e-06
2.354e-08
d
yr
n .2012999925576227 9.6798e-10 deg/d
Q 3.149985552704598 1.0098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3278  
   data-arc span      44421 days (121.62 yr)  
   first obs. used      1899-08-08  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:09:29  

Additional Information
 Earth MOID = 1.61433 au 
 Jupiter MOID = 2.30925 au 
 T_jup = 3.287 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456416.5 (2013-May-04.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08820920149134319 1.3201e-08  
q 2.631096323960541 4.2204e-08 au
tp 2456273.963544776220
(2012-Dec-12.46354478)
7.082e-05 TDB
node 231.5651955629259 1.3874e-05 deg
peri 137.1081745564332 1.9469e-05 deg
i 1.163047573421955 3.505e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3278  
   data-arc span      44421 days (121.62 yr)  
   first obs. used      1899-08-08  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:09:29  

Additional Information
 Jupiter MOID = 2.30925 au 
 T_jup = 3.287 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.742577357054048E-16 -5.480672611745102E-16 -6.151764747042329E-13 -2.438509289784686E-14 -8.333005133466354E-14 1.31261965610627E-15
q -5.480672611745102E-16 1.781141385138464E-15 1.903295800480335E-12 6.770074471402862E-14 2.712352066791559E-13 -3.840552460360544E-15
tp -6.151764747042329E-13 1.903295800480335E-12 5.015483626063799E-9 -8.199615518151928E-11 9.631625760129029E-10 7.774797243519418E-13
node -2.438509289784686E-14 6.770074471402862E-14 -8.199615518151928E-11 1.924955156786634E-10 -2.079430513197235E-10 -3.000782722365091E-12
peri -8.333005133466354E-14 2.712352066791559E-13 9.631625760129029E-10 -2.079430513197235E-10 3.790371362372813E-10 3.208415229558295E-12
i 1.31261965610627E-15 -3.840552460360544E-15 7.774797243519418E-13 -3.000782722365091E-12 3.208415229558295E-12 1.228492862532827E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.89   n/a E2021B10 IRAS observations used: 17
diameter diameter 30.422 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 29.69 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.]
[Slivan, S.M.; Binzel, R.P.; Crespo da Silva, L.D.; Kaasalainen, M.; et al. (2003) Icarus 162, 285-307.]
[Slivan, S.M.; Binzel, R.P.; Kaasalianen, M.; Hock, A.N.; et al. (2009) Icarus 200, 514-530.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.196   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.806   0.077 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.91, mean=7.63, max.=9.35) deg.
U-B UB 0.436   0.048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.91, mean=7.63, max.=9.35) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

277 Elvira (A888 JA)          Discovered 1888-May-03 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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