1923 Osiris

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1923 Osiris
Discovery [1]
Discovered by C. J. van Houten
I. van Houten G.
T. Gehrels
Discovery site Palomar Obs.
Discovery date24 September 1960
Designations
(1923) Osiris
Pronunciation /əˈsaɪrɪs/ [2]
Named after
 Osiris (Egyptian mythology) [3]
4011 P-L ·1964 TO2
1966 FR ·1974 KN
1974 KP ·1974 LE
main-belt [4] [1]  ·(inner)
Sulamitis
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 62.70 yr (22,900 days)
Aphelion 2.5900 AU
Perihelion 2.2813 AU
2.4356 AU
Eccentricity 0.0634
3.80 yr (1,388 days)
269.38°
0° 15m 33.48s / day
Inclination 4.9580°
353.07°
106.04°
Physical characteristics
Dimensions13.1 km
13.461±0.206 [5]
0.031±0.006 [5]
0.0591 ± 0.008
SMASS = C [1]
13.6 [1]

    1923 Osiris, provisional designation 4011 P-L, is a dark asteroid from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 24 September 1960, by Ingrid and Cornelis Johannes van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in the United States. [4] [6] It was named after the Egyptian god Osiris. [3]

    Contents

    Orbit and classification

    Osiris orbits the Sun in the inner main-belt at a distance of 2.3–2.6  AU once every 3 years and 10 months (1,388 days). Its orbit has an eccentricity of 0.06 and an inclination of 5° with respect to the ecliptic. [1] Due to a precovery taken at the discovering observatory in 1953, the body's observation arc is extended by 7 years prior to its official discovery observation. [4]

    Palomar–Leiden survey

    The designation P–L stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis Johannes van Houten at Leiden Observatory. The trio are credited with several thousand asteroid discoveries.

    Physical characteristics

    In the SMASS classification, Osiris is a carbonaceous C-type asteroid. [1]

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Osiris measures 13.461 kilometers in diameter and its surface has a low albedo of 0.031. [5] As of 2017, no rotational lightcurve has been obtained. [7]

    Naming

    This minor planet was named after Osiris, the Egyptian god of vegetation, of the waxing and waning Moon and of the annual flooding of the Nile. [3] The official naming citation was published by the Minor Planet Center on 1 November 1979 ( M.P.C. 5013). [8]

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    References

    1. 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 1923 Osiris (4011 P-L)" (2016-08-18 last obs.). Jet Propulsion Laboratory . Retrieved 14 June 2017.
    2. ↑ "Osiris". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 21 March 2020.
    3. 1 2 3 Schmadel, Lutz D. (2007). "(1923) Osiris". Dictionary of Minor Planet Names – (1923) Osiris. Springer Berlin Heidelberg. p. 154. doi:10.1007/978-3-540-29925-7_1924. ISBN   978-3-540-00238-3.
    4. 1 2 3 "1923 Osiris (4011 P-L)". Minor Planet Center. Retrieved 14 June 2017.
    5. 1 2 3 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 14 June 2017.
    6. ↑ "New Names of Minor Planets" (PDF), Minor Planet Circular , Cambridge, Mass: Minor Planet Center, no. MPC 5013, 1 November 1979, ISSN   0736-6884
    7. ↑ "LCDB Data for (1923) Osiris". Asteroid Lightcurve Database (LCDB). Retrieved 14 June 2017.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 14 June 2017.
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