14436 Morishita

14436 MorishitaDiscovery[1]

Discovered by| K. Endate
K. Watanabe
Discovery site| Kitami Obs.
Discovery date| 23 March 1992
Designations

MPC designation

| (14436) Morishita
Named after| Yoko Morishita
(amateur astronomer)[1]

Alternative designations

| 1992 FC2 * 1998 TN28
2000 AU60
Minor planet category| main-belt * (middle)[2]
background
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc| 25.19 yr (9,202 days)
|{{{apsis}}}|helion}}| 3.1509 AU
|{{{apsis}}}|helion}}| 1.9961 AU

Semi-major axis

| 2.5735 AU
Eccentricity| 0.2244
Orbital period| 4.13 yr (1,508 days)
Mean anomaly| 43.027°
Mean motion| 0° 14m 19.32s / day
Inclination| 1.8554°
Longitude of ascending node| 353.83°

|{{{apsis}}}|helion}}

| 208.24°
Physical characteristics
Dimensions| 3.49 km (calculated)[2]
5.656±0.247 km[3][4]
Rotation period| 972.8085±34.9213 h[5]
Geometric albedo| 0.152±0.035[3][4]
0.20 (assumed)[2]

Spectral type

| S[2]
Absolute magnitude (H)| 13.9[3] * 14.1[1] * 14.201±0.010 (R)[5] * 14.41±0.23[6] * 14.65[2]

14436 Morishita, provisional designation 1992 FC2, is a stony background asteroid and exceptionally slow rotator from the middle region of the asteroid belt, approximately 5 kilometers in diameter.

It was discovered on 23 March 1992, by Japanese astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in Japan, and named after amateur astronomer Yoko Morishita.[7]

## Contents

* 1 Orbit and classification
* 2 Photometry
* 3 Diameter and albedo
* 4 Naming
* 5 References
* 6 External links

## Orbit and classification

Morishita is a S-type asteroid that orbits the Sun in the central main-belt at a distance of 2.0–3.2 AU once every 4 years and 2 months (1,508 days). Its orbit has an eccentricity of 0.22 and an inclination of 2° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation.[7]

## Photometry

In October 2010, a rotational lightcurve of Morishita was obtained from photometric observations at the Palomar Transient Factory in California. Lightcurve analysis gave an exceptionally long rotation period of 972.8 hours with a brightness amplitude of 0.82 magnitude, indicative for a non-spheroidal shape ({{{1}}}).[5]

## Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Morishita measures 5.656 kilometers in diameter and its surface has an albedo of 0.152,[3][4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a shorter diameter of 3.49 kilometers.[2]

## Naming

This minor planet was named for Yoko Morishita (born 1947), amateur astronomer and supporter of the Astronomical Society of Shikoku, where she has made many contributions to further the spread of astronomical awareness.[7] The approved naming citation was published by the Minor Planet Center on 25 April 2013 (M.P.C. 83583).[8]

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 14436 Morishita (1992 FC2)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014436.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "LCDB Data for (14436) Morishita". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=14436|Morishita.
3. ↑ 3.0 3.1 3.2 3.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
4. ↑ 4.0 4.1 4.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M.
5. ↑ 5.0 5.1 5.2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W.
6. ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V.
7. ↑ 7.0 7.1 7.2 "14436 Morishita (1992 FC2)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=14436.
8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.

## External links

* Asteroid Lightcurve Database (LCDB), query form (info )
* Dictionary of Minor Planet Names, Google books
* Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
* Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
* 14436 Morishita at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 14436 Morishita at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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