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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09253073823725687 1.3436e-08  
a 2.883797085065869 9.0539e-09 au
q 2.616957211858275 4.3085e-08 au
i 1.162775590332486 3.5076e-07 deg
node 231.2447701657776 1.3872e-05 deg
peri 136.9131419436628 1.9023e-05 deg
M 268.3648792256244 1.4637e-05 deg
tp 2459851.807632327613
(2022-Sep-29.30763233)
7.3691e-05 TDB
period 1788.732816116677
4.90
8.4238e-06
2.306e-08
d
yr
n .2012597950662955 9.4781e-10 deg/d
Q 3.150636958273464 9.8917e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3406  
   data-arc span      44517 days (121.88 yr)  
   first obs. used      1899-08-08  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44046  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:49:29  

Additional Information
 Earth MOID = 1.61514 au 
 Jupiter MOID = 2.30792 au 
 T_jup = 3.287 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456508.5 (2013-Aug-04.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08844685234851569 1.3185e-08  
q 2.631245427231539 4.2006e-08 au
tp 2456274.462622870690
(2012-Dec-12.96262287)
7.0441e-05 TDB
node 231.5648358358167 1.3866e-05 deg
peri 137.2237804902225 1.9387e-05 deg
i 1.162977399076203 3.5025e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3406  
   data-arc span      44517 days (121.88 yr)  
   first obs. used      1899-08-08  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44046  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:49:29  

Additional Information
 Jupiter MOID = 2.30792 au 
 T_jup = 3.287 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.738375236951294E-16 -5.44878992509325E-16 -6.10482100989719E-13 -2.45995170259508E-14 -8.214791718565383E-14 1.31592586869546E-15
q -5.44878992509325E-16 1.764508450598639E-15 1.874815129535636E-12 6.878700362969666E-14 2.64626515534463E-13 -3.85458673026329E-15
tp -6.10482100989719E-13 1.874815129535636E-12 4.961982917166754E-9 -7.977697551501466E-11 9.503233251061195E-10 7.401309412303988E-13
node -2.45995170259508E-14 6.878700362969666E-14 -7.977697551501466E-11 1.922655000028802E-10 -2.072757510962876E-10 -2.994525842255825E-12
peri -8.214791718565383E-14 2.64626515534463E-13 9.503233251061195E-10 -2.072757510962876E-10 3.758436827479088E-10 3.194731949223884E-12
i 1.31592586869546E-15 -3.85458673026329E-15 7.401309412303988E-13 -2.994525842255825E-12 3.194731949223884E-12 1.226753209604731E-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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