“201 Penelope”的意思、由来-开放百科全书

Penelope (minor planet designation: 201 Penelope) is a large main belt asteroid that was discovered by Austrian astronomer Johann Palisa on August 7, 1879, in Pola. The asteroid is named after Penelope, the wife of Odysseus in Homer's The Odyssey.

Based upon the spectra of this object, it is classified as a M-type asteroid, indicating it may be metallic in composition. It may be the remnant of the core of a larger, differentiated asteroid. Near infrared absorption features indicate the presence of variable amounts of low-iron, low-calcium orthopyroxenes on the surface. Trace amounts of water is detected with a mass fraction of about 0.13–0.15 wt%.^[10] It has an estimated size of around 88 km. With a rotation period of 3.74 hours, it is the fastest rotating asteroid larger than 50 km in diameter.^[1]

References

1. ^¹{{Citation |last1=Hardersen |first1=Paul S. |last2=Gaffey |first2=Michael J. |last3=Abell |first3=Paul A. |title=Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids |work=Icarus |volume=175 |issue=1 |pages=141–158 |date=January 1983 |doi=10.1016/j.icarus.2004.10.017 |bibcode=2005Icar..175..141H |url= |postscript=. }}
2. ^¹²³⁴⁵{{cite web |title=JPL Small-Body Database Search Engine: diameter > 50 (km) and rot_per > 0 (h) |publisher=JPL Solar System Dynamics |url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=AND;c1_group=OBJ;c1_item=Ap;c1_op=%3E;c1_value=50;c2_group=OBJ;c2_item=As;c2_op=%3E;c2_value=0;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiApAs;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AsA |accessdate=12 May 2016}}

External links

The Asteroid Orbital Elements Database

Minor Planet Discovery Circumstances

[https://archive.is/20060614093519/http://www.psi.edu/pds/archive/lc.html Asteroid Lightcurve Parameters]

[https://web.archive.org/web/20041205000314/http://www.psi.edu/pds/archive/albedo.html Asteroid Albedo Compilation]

词条	201 Penelope
释义	References External links {{Infobox planet \| minorplanet=yes \| background=#D6D6D6 \| name=201 Penelope \| image=201Penelope (Lightcurve Inversion).png \| image_size = 265 \| caption=A three-dimensional model of 201 Penelope based on its light curve. \| discoverer=Johann Palisa \| discovered=7 August 1879 \| mpc_name=(201) Penelope \| alt_names=A869 GA \| named_after=Penelópē \| mp_category=Main belt \| epoch=31 July 2016 (JD 2457600.5) \| semimajor={{Convert\|2.67737\|AU\|Gm\|abbr=on}} \| perihelion={{Convert\|2.19242\|AU\|Gm\|abbr=on}} \| aphelion={{Convert\|3.16233\|AU\|Gm\|abbr=on\|lk=on}} \| eccentricity=0.18113 \| period=4.38 yr (1600.2 d) \| inclination=5.75820° \| asc_node=157.026° \| arg_peri=180.859° \| mean_anomaly=79.3202° \| avg_speed=18.19 km/s \| dimensions={{val\|68.39\|3.5\|ul=km}}^[1] 87.72 km \| mass= \| density= \| rotation={{Convert\|3.7474\|h\|d\|abbr=on\|lk=on}} \| spectral_type=M (Tholen) \| abs_magnitude=8.43,^[1] 8.54 \| albedo={{val\|0.1604\|0.018}}^[1] 0.0881 ± 0.0187 \| single_temperature= \| mean_motion={{Deg2DMS\|0.224978\|sup=ms}} / day \| orbit_ref=^[1] \| observation_arc=136.51 yr (49860 d) \| uncertainty=0 }} Penelope (minor planet designation: 201 Penelope) is a large main belt asteroid that was discovered by Austrian astronomer Johann Palisa on August 7, 1879, in Pola. The asteroid is named after Penelope, the wife of Odysseus in Homer's The Odyssey. Based upon the spectra of this object, it is classified as a M-type asteroid, indicating it may be metallic in composition. It may be the remnant of the core of a larger, differentiated asteroid. Near infrared absorption features indicate the presence of variable amounts of low-iron, low-calcium orthopyroxenes on the surface. Trace amounts of water is detected with a mass fraction of about 0.13–0.15 wt%.^[10] It has an estimated size of around 88 km. With a rotation period of 3.74 hours, it is the fastest rotating asteroid larger than 50 km in diameter.^[1] References 1. ^¹{{Citation \|last1=Hardersen \|first1=Paul S. \|last2=Gaffey \|first2=Michael J. \|last3=Abell \|first3=Paul A. \|title=Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids \|work=Icarus \|volume=175 \|issue=1 \|pages=141–158 \|date=January 1983 \|doi=10.1016/j.icarus.2004.10.017 \|bibcode=2005Icar..175..141H \|url= \|postscript=. }} 2. ^¹²³⁴⁵{{cite web \|title=JPL Small-Body Database Search Engine: diameter > 50 (km) and rot_per > 0 (h) \|publisher=JPL Solar System Dynamics \|url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=AND;c1_group=OBJ;c1_item=Ap;c1_op=%3E;c1_value=50;c2_group=OBJ;c2_item=As;c2_op=%3E;c2_value=0;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiApAs;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AsA \|accessdate=12 May 2016}} See Table 4.^[1]^[2] }} External links The Asteroid Orbital Elements Database Minor Planet Discovery Circumstances [https://archive.is/20060614093519/http://www.psi.edu/pds/archive/lc.html Asteroid Lightcurve Parameters] [https://web.archive.org/web/20041205000314/http://www.psi.edu/pds/archive/albedo.html Asteroid Albedo Compilation] {{AstDys\|201}} {{JPL small body}} {{Minor planets navigator \|200 Dynamene \|number=201 \|202 Chryseïs}}{{Small Solar System bodies}}{{DEFAULTSORT:Penelope}}{{C-beltasteroid-stub}} 7 : Background asteroids\|Discoveries by Johann Palisa\|Minor planets named from Greek mythology\|Named minor planets\|M-type asteroids (Tholen)\|X-type asteroids (SMASS)\|Astronomical objects discovered in 1879
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