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2102 Tantalus (1975 YA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2002102
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 214 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2991482367103558 2.7181e-08  
a 1.290150777425465 1.006e-09 au
q .9042044472681423 3.5288e-08 au
i 64.00699389687908 1.1287e-05 deg
node 94.362492061007 1.6095e-06 deg
peri 61.54106216165513 8.6974e-06 deg
M 81.98646976890842 7.0669e-06 deg
tp 2458878.601372606049
(2020-Jan-30.10137261)
1.048e-05 TDB
period 535.2530238893667
1.47
6.2602e-07
1.714e-09
d
yr
n .6725791054557586 7.8663e-10 deg/d
Q 1.676097107582787 1.3069e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1350  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      16264 days (44.53 yr)  
   first obs. used      1975-12-30  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .30457  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-12 07:30:17  

Additional Information
 Earth MOID = .0434654 au 
 Jupiter MOID = 3.76209 au 
 T_jup = 4.450 
[ 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 16.0   n/a MPO302073  
diameter diameter 1.649 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 2.384 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L.; Mottola, S.; et al. (1997) Icarus 130, 275-286.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 79-83.]
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 223-237.]
geometric albedo albedo 0.245   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B Q   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2102 Tantalus (1975 YA)          Discovered 1975-Dec-27 by Kowal, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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