1691 Oort

1691 Oort
Lightcurve-based 3D-model of Oort
Discovery[1]
Discovered byK. Reinmuth
I. Groeneveld
Discovery siteHeidelberg Obs.
Discovery date9 September 1956
Designations
(1691) Oort
Named after
Jan Oort (astronomer)[2]
1956 RB · 1945 TD
1947 DA · 1950 PZ
1950 RU · 1951 XW
1955 MW · 1956 SD
1964 DA · A917 TD
main-belt · Themis[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc71.42 yr (26,086 days)
Aphelion3.7153 AU
Perihelion2.6084 AU
3.1618 AU
Eccentricity0.1750
5.62 yr (2,054 days)
240.25°
Inclination1.0860°
174.55°
232.69°
Physical characteristics
Dimensions27.13 km (calculated)[3]
33.163±0.534 km[4]
33.644±0.267[5]
37.37±0.74 km[6]
10.2684±0.0005 h[7]
10.2705±0.0004 h[8]
0.053±0.002[6]
0.065±0.011[5]
0.0672±0.0150[4]
0.10 (assumed)[3]
Tholen = CU[1] · CU[3]
B–V = 0.682[1]
U–B = 0.316[1]
10.90±0.12[9] · 10.95[1][3][4][6]

1691 Oort, provisional designation 1956 RB, is a rare-type carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 33 kilometers in diameter.

It was discovered on 9 September 1956, by German astronomer Karl Reinmuth and Dutch astronomer Ingrid van Houten-Groeneveld at Heidelberg Observatory in south-west Germany.[10] It was later named after Dutch astronomer Jan Oort.[2]

  1. ^ a b c d e f Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Hanus-2013c was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference MPC-Oort was invoked but never defined (see the help page).