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1916 Boreas (1953 RA)
Classification: Amor [NEO]          SPK-ID: 2001916
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 260 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4496411673900472 3.6933e-08  
a 2.273086560372281 2.954e-09 au
q 1.251013265787861 8.4563e-08 au
i 12.8801026568061 4.6169e-06 deg
node 340.5990723109578 1.3154e-05 deg
peri 335.8670314546559 1.3608e-05 deg
M 179.6982275433282 4.8958e-06 deg
tp 2458375.667399213437
(2018-Sep-14.16739921)
1.6223e-05 TDB
period 1251.763800669242
3.43
2.4401e-06
6.681e-09
d
yr
n .2875941929360235 5.6062e-10 deg/d
Q 3.2951598549567 4.2822e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1550  
   data-arc span      24369 days (66.72 yr)  
   first obs. used      1953-09-01  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4683  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 09:04:42  

Additional Information
 Earth MOID = .252842 au 
 Jupiter MOID = 2.07022 au 
 T_jup = 3.440 
[ show covariance matrix ]

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 14.8   n/a MPO502171  
diameter diameter 3.5 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 3.4746 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pravec, P.; Wolf, M.; Sarounova, L. (2001) http://www.asu.cas.cz/~ppravec/neo.htm]
[Krugly, Yu.N.; Belskaya, I.N.; Chiorny, V.G.; Shevchenko, V.G.; Gaflonyuk, N.M. (2002) Proc. ACM 2002, ESA SP 500, 903-906.]
[Robinson, L. (2002) Minor Planet Bull. 29, 37-38.]
B-V BV 0.852   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=12.59, mean=18.01, max.=27.67) deg.
U-B UB 0.407   0.064 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=12.59, mean=14.79, max.=19.17) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   n/a Binzel et al. (2004) Icarus 170, 259-294  

1916 Boreas (1953 RA)          Discovered 1953-Sep-01 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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