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1384 Kniertje
Discovery [1]
Discovered by H. van Gent
Discovery site Johannesburg Obs.
Discovery date9 September 1934
Designations
(1384) Kniertje
Named after
Kniertje [2] (fictional character)
1934 RX
main-belt · ( middle)
Eunomia [3] · Adeona [4]
Orbital characteristics [1]
Epoch 4 September 2017 ( JD 2458000.5)
Uncertainty parameter 0
Observation arc83.06 yr (30,338 days)
Aphelion3.1649 AU
Perihelion2.1872 AU
2.6760 AU
Eccentricity0.1827
4.38 yr (1,599 days)
288.15 °
0° 13m 30.36s / day
Inclination11.858°
152.86°
276.17°
Physical characteristics
Dimensions21.52±6.01 km [5]
21.72±6.93 km [6]
26.14±0.56 km [7]
26.29±0.38 km [8]
26.517±0.090 km [9]
26.59 km (derived) [3]
27.51±1.6 km [10]
29.592±0.230 km [11]
9.78±0.02 h [12]
9.807±0.002 h [12]
9.808±0.001 h [12]
9.824±0.001 h [13]
9.872±0.012 h [14]
12.255±0.004 h [15] [a]
0.0351±0.0035 [11]
0.06±0.03 [6]
0.064±0.006 [8]
0.066±0.003 [7]
0.07±0.05 [5]
0.0701 (derived) [3]
0.3077±0.039 [10]
S (assumed, Eunomia) [3]
C (assumed; Adeona) [16]: 23 
9.70 [10] · 11.38 [3] [11] · 11.4 [17] · 11.50 [7] [8] · 11.60 [1] [6] · 11.64 [5] · 11.81±0.22 [18]

1384 Kniertje, provisional designation 1934 RX, is a dark Adeonian asteroid from the central regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. [19] The asteroid was named after a character in the Dutch play Op Hoop van Zegen by Herman Heijermans. [2]

Orbit and classification

Kniertje is a member of the Adeona family ( 505), [4] a large family of carbonaceous asteroids in the central main belt, named after 145 Adeona. It is also dynamically classified as a member of the Eunomia family ( 502), the largest in the intermediate main belt with more than 5,000 stony asteroids. [3] [16]: 23 

The asteroid orbits the Sun in the central asteroid belt at a distance of 2.2–3.2  AU once every 4 years and 5 months (1,599 days). Its orbit has an eccentricity of 0.18 and an inclination of 12 ° with respect to the ecliptic. [1] The body's observation arc begins with its official discovery observation at Johannesburg in 1934. [19]

Physical characteristics

Kniertje's spectral type is unknown. Although the LCDB assumes an S-type (due to its dynamical classification to the stony Eunomia family), a low albedo of 0.0701 is derived (see below) which is typical for carbonaceous C-type asteroids and in agreement with the overall spectral type of the Adeona family ( 505). [3] [16]: 23 

Rotation period

Several rotational lightcurves of Kniertje have been obtained from photometric observations since 2003. Lightcurve analysis gave a rotation period between 9.78 and 9.872 hours with a brightness variation between 0.15 and 0.32 magnitude ( U=2/2/2/2/2). [12] [13] [14] An alternative period solution of 12.255 hours with an amplitude of 0.33 magnitude was found by Brian Warner in March 2006 ( U=2). [15] [a]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kniertje measures between 21.52 and 29.592 kilometers in diameter and its surface has an albedo between 0.0351 and 0.3077. [5] [6] [7] [8] [9] [10] [11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0701 and a diameter of 26.59 kilometers based on an absolute magnitude of 11.38. [3]

Naming

This minor planet was named after the principal character in Op Hoop van Zegen, a play by Dutch writer Herman Heijermans (1864–1924). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 125). [2]

Notes

  1. ^ a b Lightcurve plot of 1384 Kniertje, Palmer Divide Observatory, Brian D. Warner (2006). Observer's comment: "a period of 9.816 h cannot be formally excluded". Summary figures at LCDB.

References

  1. ^ a b c d "JPL Small-Body Database Browser: 1384 Kniertje (1934 RX)" (2017-10-01 last obs.). Jet Propulsion Laboratory. Retrieved 27 October 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1384) Kniertje". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 112. doi: 10.1007/978-3-540-29925-7_1385. ISBN  978-3-540-00238-3.
  3. ^ a b c d e f g h "LCDB Data for (1384) Kniertje". Asteroid Lightcurve Database (LCDB). Retrieved 27 October 2017.
  4. ^ a b "Asteroid 1384 Kniertje – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
  5. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923. Bibcode: 2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63.
  6. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522. Bibcode: 2015ApJ...814..117N. doi: 10.1088/0004-637X/814/2/117. Retrieved 27 October 2017.
  7. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode: 2011PASJ...63.1117U. doi: 10.1093/pasj/63.5.1117. ( online, AcuA catalog p. 153)
  8. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv: 1209.5794. Bibcode: 2012ApJ...759L...8M. doi: 10.1088/2041-8205/759/1/L8. Retrieved 27 October 2017.
  9. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv: 1406.6645. Bibcode: 2014ApJ...791..121M. doi: 10.1088/0004-637X/791/2/121. Retrieved 27 October 2017.
  10. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. Retrieved 22 October 2019.
  11. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407. Bibcode: 2011ApJ...741...90M. doi: 10.1088/0004-637X/741/2/90.
  12. ^ a b c d Behrend, Raoul. "Asteroids and comets rotation curves – (1384) Kniertje". Geneva Observatory. Retrieved 27 October 2017.
  13. ^ a b Hawkins, Scot; Ditteon, Richard (March 2008). "Asteroid Lightcurve Analysis at the Oakley Observatory - May 2007". The Minor Planet Bulletin. 35 (1): 1–4. Bibcode: 2008MPBu...35....1H. ISSN  1052-8091. Retrieved 27 October 2017.
  14. ^ a b Vinson, Rachel; Moore, Robert; Ditteon, Richard (July 2014). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2013 October". The Minor Planet Bulletin. 41 (3): 169–170. Bibcode: 2014MPBu...41..169V. ISSN  1052-8091. Retrieved 27 October 2017.
  15. ^ a b Warner, Brian D. (December 2006). "Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006". The Minor Planet Bulletin. 33 (4): 85–88. Bibcode: 2006MPBu...33...85W. ISSN  1052-8091. Retrieved 27 October 2017.
  16. ^ a b c Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628. Bibcode: 2015aste.book..297N. doi: 10.2458/azu_uapress_9780816532131-ch016. ISBN  9780816532131.
  17. ^ Faure, Gerard; Garret, Lawrence (December 2007). "Suggested Revised H Values of Selected Asteroids: Report Number 3". The Minor Planet Bulletin. 34 (4): 95–99. Bibcode: 2007MPBu...34...95F. ISSN  1052-8091. Retrieved 27 October 2017.
  18. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762. Bibcode: 2015Icar..261...34V. doi: 10.1016/j.icarus.2015.08.007. Retrieved 27 October 2017.
  19. ^ a b "1384 Kniertje (1934 RX)". Minor Planet Center. Retrieved 27 October 2017.

External links

Retrieved from " https://en.wikipedia.org/?title=1384_Kniertje&oldid=1191753951"

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