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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 1011 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3967830583744957 1.3337e-08  
a 1.86327294504367 1.815e-10 au
q 1.123957807322788 2.4798e-08 au
i 8.451869889021321 2.3953e-06 deg
node 133.1193427586828 1.4166e-05 deg
peri 167.7934626032436 1.4064e-05 deg
M 256.5069001498996 1.1972e-06 deg
tp 2459267.568113285847
(2021-Feb-22.06811329)
3.0829e-06 TDB
period 928.9945022630588
2.54
1.3574e-07
3.716e-10
d
yr
n .3875157486110295 5.6622e-11 deg/d
Q 2.602588082764551 2.5352e-10 au
  Orbit Determination Parameters
   # obs. used (total)      7298  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      33143 days (90.74 yr)  
   first obs. used      1929-09-25  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35876  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-12 06:35:44  

Additional Information
 Earth MOID = .111952 au 
 Jupiter MOID = 2.65747 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 12.7   n/a MPO502169  
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-August); 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.]
[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.]
[Alton, K.B. (2019) Minor Planet Bull. 46, 114-117.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1901-Jul-11 20:46 < 00:01 Earth 0.246545515569606 0.246545241818848 0.246545789320365 8.38353751248153 8.3822483094116 2415577.365470126 0.0749629707369841 13.8749328449312 5.53059715450278 11.3748061644431 1654275.96079601 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1906-Aug-17 18:28 < 00:01 Earth 0.393166750623468 0.393166396237441 0.393167105009517 13.4704491105337 13.4699460020876 2417440.269565662 0.0304213702822567 18.3024585751056 4.50163240009403 15.5821629563166 3965530.42582953 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1929-Jul-19 10:23 < 00:01 Earth 0.166522677711391 0.166522538384891 0.166522817037909 6.54987970675128 6.54743635125782 2425811.932895993 0.0494236804058229 8.07932547908106 4.75557548844813 39.2213090640729 2485368.76509604 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1934-Aug-22 18:18 < 00:01 Earth 0.482950514949334 0.482950269694615 0.482950760204081 15.8821932673442 15.8818458879958 2427672.262343798 0.0367413348144956 13.3297415972454 4.32302599207999 24.867835757867 7539136.99718278 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1957-Jul-21 08:58 < 00:01 Earth 0.150179763570071 0.15017969708574 0.150179830054403 6.29271402235159 6.28989394987243 2436040.873820334 0.0377363067731663 5.94876773286339 3.23268593820367 81.5779732695879 4234694.23389004 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1962-Aug-23 03:49 < 00:01 Earth 0.486435277353995 0.486435126263727 0.48643542844429 15.9410863469201 15.9407427303805 2437899.658914312 0.040202209791159 9.33709345519161 3.90695089843888 40.5670960715899 12108823.3909601 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1985-Jul-16 15:26 < 00:01 Earth 0.200732931315925 0.200732878382742 0.200732984249108 7.3196276344464 7.31781396327257 2446263.143046596 0.0412651090873916 5.85241229857062 2.63818187211941 -89.7974074248563 4912606.67977509 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
1990-Aug-19 15:40 < 00:01 Earth 0.407668921750179 0.40766880993473 0.40766903356565 13.8788252098887 13.8783542765743 2448123.152490236 0.0400590612302016 7.96373124366387 3.01364050408983 50.4751108992243 16981671.3627628 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2013-Jul-06 21:16 < 00:01 Earth 0.321571413076571 0.321571396184407 0.321571429968735 10.4527099261123 10.4519172012251 2456480.385869580 0.0502566804813679 5.97680073711958 0.83942705259021 89.441820672656 9076299.79832652 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2018-Aug-12 14:32 < 00:01 Earth 0.283998068987753 0.283997980962593 0.28399815701293 10.500608730627 10.4997152174304 2458343.105629311 0.037697810569456 6.74174107260537 3.0910069156437 58.6490784254405 16418800.9411928 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2041-Jun-29 06:58 < 00:01 Earth 0.435301550701917 0.435301482887827 0.435301618516007 13.6383375311575 13.6378887156503 2466699.789974186 0.0499322328365733 5.94004788028862 3.33873857576731 83.7222531303907 14627828.3437733 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2046-Aug-06 06:42 < 00:01 Earth 0.177476685133231 0.177476604784513 0.177476765481959 7.83198422622633 7.83006709252696 2468563.779316535 0.0338301168055278 5.85637087080017 3.9857661275517 84.477044580217 5909881.15469807 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2074-Aug-03 16:48 < 00:01 Earth 0.140738167182974 0.140738102521755 0.14073823184421 6.97129674682703 6.96858048573708 2478788.200008796 0.0362908664667331 6.28242428668754 2.90424256163801 -75.4568583478524 4438689.04493287 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2097-Jun-25 12:24 < 00:01 Earth 0.48654775619212 0.486547435615895 0.486548076768345 15.281467629253 15.2811092631623 2487150.016757518 0.0269147479559474 15.9879373869612 5.8602026598892 -1.06460601246745 4004399.0992572 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2102-Aug-06 04:18 < 00:01 Earth 0.156950537146998 0.156950355085832 0.1569507192082 7.31419558964151 7.31187417935096 2489016.678993181 0.0500087258447112 9.90924998956641 4.85577814948386 -27.4477273206743 1883107.48323454 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2125-Jul-03 19:10 < 00:01 Earth 0.397284743061542 0.397284250304687 0.397285235818396 12.5975271907695 12.5969947953108 2497384.298657625 0.0168429994801573 24.6054284883314 5.9413701176606 -3.13891215778593 1997209.56018822 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2130-Aug-12 12:53 < 00:01 Earth 0.249441383318024 0.249440974733042 0.249441791903021 9.57319408173012 9.57207821507864 2499250.036791357 0.0713130765707122 20.5126961276097 4.64479177336665 -6.93623627917319 1329850.86096215 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2153-Jul-13 00:49 < 00:01 Earth 0.271361799446898 0.271361314607953 0.271362284285843 9.21495473046862 9.21388912718145 2507620.534014275 0.0218580219829324 24.1972061663085 5.68925924781583 -2.5720587325471 1320751.02544669 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2158-Aug-20 02:44 < 00:01 Earth 0.375782407736531 0.375782007853968 0.375782807619116 12.8670271225036 12.8664760522158 2509484.614123059 0.0715160332439621 20.2662923660526 4.01103389364292 -10.5266927814036 2465306.31967689 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2181-Jul-21 20:30 < 00:01 Earth 0.166471399519955 0.166471154183039 0.166471644856871 6.79381252912859 6.79145620794336 2517856.354399013 0.0242276743564125 12.232358546693 5.20167237197566 -0.117481963382132 1759486.74073121 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36
2186-Aug-26 02:04 < 00:01 Earth 0.473183249648711 0.4731830978066 0.473183401490849 15.5926208042094 15.5922596697705 2519717.585903398 0.0575606390393089 9.37419003191886 3.49229955013619 -39.4487381371624 8414343.24122317 T 1011 CATAB v2.0f-lin.ifort 2020-Jul-12 06:35:57 2020-Jul-12 06:36

Alternate Designations
 1929 SH = 1957 NA = 1957 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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