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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
1686 De Sitter (1935 SR1)
Classification: Main-belt Asteroid          SPK-ID: 2001686
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159808116895225 2.8848e-08  
a 3.164037192759286 1.157e-08 au
q 2.658398367197971 8.9337e-08 au
i .6168672447788385 3.3152e-06 deg
node 6.31839795218748 0.00029594 deg
peri 294.5788718264719 0.00029612 deg
M 142.7141909904151 1.1135e-05 deg
tp 2458581.560335934940
(2019-Apr-08.06033594)
6.2306e-05 TDB
period 2055.705021535843
5.63
1.1275e-05
3.087e-08
d
yr
n .1751224014285082 9.6053e-10 deg/d
Q 3.669676018320602 1.3419e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3851  
   data-arc span      32158 days (88.04 yr)  
   first obs. used      1933-04-14  
   last obs. used      2021-04-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42346  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:40:17  

Additional Information
 Earth MOID = 1.64245 au 
 Jupiter MOID = 1.55647 au 
 T_jup = 3.184 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456819.5 (2014-Jun-11.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1634260202360066 2.8581e-08  
q 2.643955961690044 8.8767e-08 au
tp 2456531.696324331582
(2013-Aug-27.19632433)
5.9606e-05 TDB
node 6.513539025692028 0.00029319 deg
peri 294.9561312317697 0.00029337 deg
i .6221648507658976 3.3212e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3851  
   data-arc span      32158 days (88.04 yr)  
   first obs. used      1933-04-14  
   last obs. used      2021-04-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42346  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:40:17  

Additional Information
 Jupiter MOID = 1.55647 au 
 T_jup = 3.184 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.168581768013099E-16 -2.52276069273025E-15 1.44544584589787E-13 3.178915486496668E-15 6.866546151296881E-15 -1.195638974911828E-17
q -2.52276069273025E-15 7.879517537057686E-15 -4.385004385767533E-13 -1.176416650859372E-14 -1.693169958014151E-14 4.567313560821337E-17
tp 1.44544584589787E-13 -4.385004385767533E-13 3.552855372938643E-9 -4.031427787206314E-12 6.229308906533973E-10 -8.295197315176699E-14
node 3.178915486496668E-15 -1.176416650859372E-14 -4.031427787206314E-12 8.596290647773924E-8 -8.595767773934281E-8 8.180096915924967E-11
peri 6.866546151296881E-15 -1.693169958014151E-14 6.229308906533973E-10 -8.595767773934281E-8 8.606610411635212E-8 -8.18099684186818E-11
i -1.195638974911828E-17 4.567313560821337E-17 -8.295197315176699E-14 8.180096915924967E-11 -8.18099684186818E-11 1.103026109074072E-11

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 11.20   n/a E2021B10  
diameter diameter 29.661 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.292 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Polakis, T. (2020) Minor Planet Bull. 47, 13-17.]
geometric albedo albedo 0.088   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1686 De Sitter (1935 SR1)          Discovered 1935-Sep-28 by Van Gent, H. 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
1932-May-24 20:27 00:02 Jupiter 1.80992702103968 1.80992620037336 1.80992784170569 2.09332911998224 1.85635465087429 2426852.352235902 1.50262846734515 55.7814831263612 7.51253279346084 -86.3109217144955 1973384.81853458 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
1943-Feb-06 07:28 00:01 Jupiter 1.60035979328137 1.60035937827426 1.60036020828811 1.56171806708927 1.17491413172267 2430761.811000844 1.24239458469673 68.5826315044343 46.9007086322254 -44.2749450883825 2750779.5972037 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
1953-Oct-17 00:14 00:01 Jupiter 1.63018390218736 1.63018356323793 1.6301842411366 1.89364185254902 1.59583999330112 2434667.509816101 1.02496638790837 38.4661194707426 20.7110220280704 82.3370251763123 2704198.16502701 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
1964-Jun-10 12:20 < 00:01 Jupiter 1.8758939016986 1.87589344294283 1.87589436045446 3.24430853007954 3.10201187804644 2438557.013859889 0.811652375762029 43.9452216483659 11.5297460144252 -75.7886559672876 3628152.94196692 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2039-Oct-14 17:24 < 00:01 Jupiter 1.9353864519854 1.93538610748833 1.93538679648247 2.49091804237908 2.30854327279875 2466076.224847008 0.519605895744016 42.5666079150706 7.76011765789014 -89.2984219520113 3910924.44111955 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2050-Jun-28 17:04 < 00:01 Jupiter 1.67000528429167 1.67000500073899 1.67000556784427 1.68669774882419 1.35297978135758 2469986.211189178 0.748258483517031 59.6848385350262 28.8966216892157 -75.6641213430871 3534677.2726781 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2061-Mar-13 22:56 00:01 Jupiter 1.59678993755676 1.59678960570539 1.59679026940794 1.65502703488621 1.29545662296078 2473897.455659083 1.02346424662195 59.1006068475665 37.7978939633344 -41.8723275524266 2729888.37553882 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2071-Nov-13 19:23 00:01 Jupiter 1.76391260050973 1.76391197219776 1.7639132288216 2.58374379404957 2.39067802651249 2477794.307923851 1.30722294398498 46.8887180015947 7.07918177650536 -80.4557342233928 2496818.65304037 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2157-Nov-22 21:11 00:03 Jupiter 1.77583744044936 1.77583639009234 1.77583849080657 1.94309014533484 1.67977909804009 2509214.382824987 2.7457338248501 95.4345021963573 11.3893266439431 88.9824750824304 2144704.55106218 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2168-Aug-09 10:02 00:03 Jupiter 1.60954543230316 1.60954513259313 1.6095457320131 1.58130238180497 1.20333627168347 2513126.917994495 3.0005042886914 114.497444050876 42.0856556686664 -65.2911874589625 3452111.01224221 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2179-Apr-19 03:32 00:03 Jupiter 1.68144739283047 1.68144631738223 1.68144846827737 2.08743850167736 1.83027521540815 2517031.647470281 3.39627391315167 55.4735985645282 18.1875639887998 66.8729209005057 1249839.08006129 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40
2189-Dec-14 16:20 00:04 Jupiter 1.92858496675696 1.9285833460935 1.92858658742327 3.52143842158238 3.39442793528683 2520924.180552134 3.61535269489554 148.99551818888 13.6522382707661 -67.1360678060974 3260302.98637537 T 50 CATAB v2.0g-lin.ifort 2021-Jul-08 12:40:53 2021-Jul-08 12:40

Alternate Designations
 1935 SR1 = 1929 RK1 = 1933 GF = 1951 NG = 1952 UO1 = 1956 GG = 1958 VA = 1963 RD = 1967 GK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 00:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin