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JPL Small-Body Database Browser
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1627 Ivar (1929 SH)
Classification: Amor [NEO]          SPK-ID: 2001627
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 921 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .39661325953163 1.3364e-08  
a 1.863481492923384 1.8311e-10 au
q 1.124400023938173 2.485e-08 au
i 8.450367746398353 2.4169e-06 deg
node 133.1221730604873 1.5495e-05 deg
peri 167.7698113233515 1.5377e-05 deg
M 101.5580084379619 1.3233e-06 deg
tp 2458338.381467564748
(2018-Aug-07.88146756)
3.4209e-06 TDB
period 929.1504739809205
2.54
1.3695e-07
3.749e-10
d
yr
n .3874506983326281 5.7107e-11 deg/d
Q 2.602562961908596 2.5573e-10 au
  Orbit Determination Parameters
   # obs. used (total)      6740  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      32951 days (90.21 yr)  
   first obs. used      1929-09-25  
   last obs. used      2019-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36363  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-15 00:49:51  

Additional Information
 Earth MOID = .11161 au 
 Jupiter MOID = 2.65501 au 
 T_jup = 3.879 
[ 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 13.2   n/a PDS3 (MPC 17262)  
magnitude slope G 0.60   n/a PDS3 (MPC 17262) Fit
diameter diameter 9.12 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 4.795 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1985) Bull. Amer. Astron. Soc. 17, 726.]
[Lupishko, D.F.; Velichko, F.P.; Shevchenko, V.G. (1986) Kin. Fiz. Neb. Tel 2(5), 39-43; Kinematics and Physics of Celestial Bodies 2(5), 47-51.]
[Hahn, G.; Magnusson, P.; Harris, A.W.; Young, J.W.; et al. (1989) Icarus 78, 363-381.]
[Pravec, P.; Sarounova, L.; Wolf, M. (1996) Icarus 124, 471-482.]
[Kiss, L.L.; Szabo, G.; Sarneczky, K. (1999) Astron. Astrophys. Suppl. Ser. 140, 21-28.]
[Szabo, G.; Kiss, L.L. (2001) Publ. Astron. Dept. of Eotvos U. #11, p. 119-124.]
[Kaasalainen, M.; et al. (2004) Icarus 167, 178-196.]
[Skiff, B.A.; Bowell, E.; Koehn, B.W.; Sanborn, J.J.; McLelland, K.P.; Warner, B.D. (2012) Minor Planet Bull. 39, 111-130.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 41-47.]
[Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2015) Icarus 256, 101-116.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 172-183.]
[Crowell, J.L.; Howell, E.S.; Magri, C.; Nolan, M.C.; et al. (2017) Icarus 291, 254-267.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2018) Minor Planet Bull. 45, 366-379.]
geometric albedo albedo 0.15   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
B-V BV 0.872   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.00, mean=9.63, max.=19.11) deg.
U-B UB 0.459   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.00, mean=9.63, max.=19.11) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

1627 Ivar (1929 SH)          Discovered 1929-Sep-25 by Hertzsprung, E. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1929 SH = 1957 NA = 1957 XA 
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