Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
1627 Ivar (1929 SH)
Classification: Amor [NEO]          SPK-ID: 2001627
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 910 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3966132597241407 1.3367e-08  
a 1.863481492937626 1.8326e-10 au
q 1.124400023588026 2.4857e-08 au
i 8.450367740790757 2.4169e-06 deg
node 133.1221741842144 1.5603e-05 deg
peri 167.7698102791568 1.5485e-05 deg
M 101.5580083946336 1.3336e-06 deg
tp 2458338.381467673573
(2018-Aug-07.88146767)
3.4476e-06 TDB
period 929.1504739915721
2.54
1.3706e-07
3.752e-10
d
yr
n .3874506983281864 5.7155e-11 deg/d
Q 2.602562962287226 2.5595e-10 au
  Orbit Determination Parameters
   # obs. used (total)      6694  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      32925 days (90.14 yr)  
   first obs. used      1929-09-25  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36469  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-20 05:00:10  

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

[ show close-approach data ]
Alternate Designations
 1929 SH = 1957 NA = 1957 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin