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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 295 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4497384615361127 3.5168e-08  
a 2.272853465402444 2.9445e-09 au
q 1.250663844575326 8.0568e-08 au
i 12.88191682058105 4.5098e-06 deg
node 340.5970680220458 1.203e-05 deg
peri 335.8842030142992 1.2538e-05 deg
M 237.1916873180886 4.9452e-06 deg
tp 2459627.453763353048
(2022-Feb-16.95376335)
1.7774e-05 TDB
period 1251.57126134619
3.43
2.4321e-06
6.659e-09
d
yr
n .2876384358752246 5.5895e-10 deg/d
Q 3.295043086229562 4.2687e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1755  
   data-arc span      24753 days (67.77 yr)  
   first obs. used      1953-09-01  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46313  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-09 05:52:50  

Additional Information
 Earth MOID = .250629 au 
 Jupiter MOID = 2.07054 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 14.87   n/a MPCxxxxx  
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. 2020-October); 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

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