1233 Kobresia

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1233 Kobresia
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date10 October 1931
Designations
(1233) Kobresia
Pronunciation /koʊˈbriːziə/ [2]
Named after
 Kobresia (flowering plant) [3]
1931 TG2 ·1927 TB
1951 QJ ·1951 RP1
1954 EG
main-belt  ·(inner) [4]
background [5]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 90.15 yr (32,928 days)
Aphelion 2.6976 AU
Perihelion 2.4143 AU
2.5560 AU
Eccentricity 0.0554
4.09 yr (1,493 days)
117.22°
0° 14m 28.32s / day
Inclination 5.6024°
291.43°
335.02°
Physical characteristics
Dimensions29.73±7.16 km [6]
30.239±10.28 km [7]
31.46±15.67 km [8]
33.323±0.159 km [9]
33.45 km (derived) [4]
33.50±0.8 km [10]
36.06±0.60 km [11]
36.167±0.249 km [12]
27.76±0.05 h [13]
27.83±0.01 h [13]
0.0305±0.0420 [7]
0.0396 (derived) [4]
0.040±0.008 [9]
0.04±0.02 [6]
0.04±0.08 [8]
0.0408±0.0074 [12]
0.041±0.002 [11]
0.047±0.007 [14]
0.0475±0.002 [10]
C [15]  · S (assumed) [4]
11.30 [10] [11] [12]  ·11.50 [1] [4] [6] [9]  ·11.57 [8]  ·11.91 [7]  ·11.91±1.30 [15]

    1233 Kobresia, provisional designation 1931 TG2, is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. [16] The asteroid was named for the grass-like flowering plant Kobresia , a genus in the sedge family. [3]

    Contents

    Orbit and classification

    Kobresia is a non-family asteroid from the main belt's background population. [5] It orbits the Sun in the central main-belt at a distance of 2.4–2.7  AU once every 4 years and 1 month (1,493 days; semi-major axis of 2.56 AU). Its orbit has an eccentricity of 0.06 and an inclination of 6° with respect to the ecliptic. [1]

    The body's observation arc begins with its first observation as 1927 TB at Heidelberg in October 1927, or four years prior to its official discovery observation. [16]

    Physical characteristics

    Kobresia has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. [15]

    Rotation period

    Two rotational lightcurves of Kobresia were obtained by French amateur astronomer Pierre Antonini. Lightcurve analysis of his photometric observations made in 2004 and 2006, gave a rotation period of 27.76 and 27.83 hours with a brightness amplitude of 0.32 and 0.34 magnitude, respectively ( U=2/2 ). [13] While not being a slow rotator, Kobresia's period is longer than that of the average asteroid.

    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, Kobresia measures between 29.73 and 36.167 kilometers in diameter and its surface has an albedo between 0.0305 and 0.0475. [6] [7] [8] [9] [10] [11] [12] [14]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0396 and a diameter of 33.45 kilometers based on an absolute magnitude of 11.5. [4]

    Naming

    This minor planet was named after a genus in the family Cyperaceae, Kobresia , a grass-like flowering plant, commonly known as "bog sedges". The author of the Dictionary of Minor Planet Names contacted Dutch astronomer Ingrid van Houten-Groeneveld in order to confirm the meaning of this asteroid's name. [3]

    Meta-naming

    The initials of the minor planets (1227) through (1234), all discovered by Reinmuth, spell out "G. Stracke". Gustav Stracke was a German astronomer and orbit computer, who had asked that no planet be named after him. In this manner Reinmuth was able to honour the man whilst honoring his wish. Nevertheless, Reinmuth directly honored Stracke by naming planet 1019 Strackea later on. [17] The astronomer Brian Marsden was honored by the same type of meta-naming using consecutive initial letters in 1995, spelling out "Brian M." in the sequence of minor planets (5694) through (5699). [17]

    Reinmuth's flowers

    Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between (1009) and (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). [18]

    Related Research Articles

    997 Priska, provisional designation 1923 NR, is a carbonaceous Adeonian asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 12 July 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid's name is a common German female name, unrelated to the discoverer's contemporaries.

    <span class="mw-page-title-main">1054 Forsytia</span> Dark background asteroid

    1054 Forsytia is a dark background asteroid, approximately 46 kilometers in diameter, from the outer regions of the asteroid belt. It was discovered on 20 November 1925, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany and assigned provisional designation 1925 WD. It is named after the flowering plant forsythia, and marks the beginning of a sequence of 28 thematically named asteroids by the discoverer.

    1060 Magnolia, provisional designation 1925 PA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 13 August 1925, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named after the flowering plant magnolia.

    1070 Tunica, provisional designation 1926 RB, is a dark background asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered on 1 September 1926, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after Petrorhagia, a flowering plant also known as "Tunica".

    1076 Viola, provisional designation 1926 TE, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 5 October 1926, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after the flowering plant Viola.

    1078 Mentha, provisional designation 1926 XB, is a stony background asteroid from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 7 December 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. Only in 1958, it was realized that this object was a rediscovery of an already numbered but lost asteroid.

    <span class="mw-page-title-main">1080 Orchis</span>

    1080 Orchis, provisional designation 1927 QB, is an dark background asteroid from the inner regions of the asteroid belt. It was discovered on 30 August 1927, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The carbonaceous F-type asteroid has a rotation period of 16.1 hours and measures approximately 22 kilometers in diameter. It was named after the flowering plant Orchis.

    <span class="mw-page-title-main">1081 Reseda</span> Dark background asteroid

    1081 Reseda is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 31 August 1927, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid has a rotation period of 7.3 hours and measures approximately 37 kilometers in diameter. It was named after the herbaceous plant Reseda.

    <span class="mw-page-title-main">1082 Pirola</span> Asteroid

    1082 Pirola is a dark Themistian asteroid from the outer regions of the asteroid belt. It was discovered on 28 October 1927, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany, and assigned the provisional designation 1927 UC. The carbonaceous C-type asteroid has a rotation period of 15.9 hours and measures approximately 41 kilometers in diameter. It was named after the herbaceous plant Pyrola (wintergreen).

    1085 Amaryllis, provisional designation 1927 QH, is a background asteroid from the outer regions of the asteroid belt, approximately 69 kilometers in diameter. It was discovered on 31 August 1927, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the flowering plant Amaryllis.

    1092 Lilium, provisional designation 1924 PN, is a dark, carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 12 January 1924, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after the flower Lilium.

    1097 Vicia, provisional designation 1928 PC, is an asteroid from the central regions of the asteroid belt, approximately 23 kilometers in diameter. Discovered by Karl Reinmuth at the Heidelberg Observatory in 1928, the asteroid was later named after the flowering plant Vicia, commonly known as vetches.

    1106 Cydonia, provisional designation 1929 CW, is a Eunomian asteroid from the central regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 5 February 1929, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany. The asteroid was named for the fruit-bearing tree Cydonia (quince). The S-type asteroid has a relatively short rotation period of 2.7 hours.

    1156 Kira, provisional designation 1928 DA, is a stony background asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 22 February 1928, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. Any reference of its name to a person or occurrence is unknown.

    <span class="mw-page-title-main">1231 Auricula</span> Carbonaceous background asteroid

    1231 Auricula (prov. designation: 1931 TE2) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 20 kilometers (12 miles) in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory. The likely elongated C-type asteroid has a rotation period of 3.98 hours. It was named after the flowering plant auricula and indirectly honors astronomer Gustav Stracke.

    1232 Cortusa, provisional designation 1931 TF2, is a background asteroid from the outer regions of the asteroid belt, approximately 40 kilometers (25 miles) in diameter. It was discovered on 10 October 1931, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The X-type asteroid has a rotation period of 25.2 hours. It was named after the plant Cortusa and indirectly honors astronomer Gustav Stracke.

    1234 Elyna, provisional designation 1931 UF, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 18 October 1931, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named after the flowering plant Elyna.

    1250 Galanthus, provisional designation 1933 BD, is a dark background asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 25 January 1933, by German astronomer Karl Reinmuth at the Heidelberg Observatory. The asteroid was named for the herbaceous plant Galanthus, also known as "snowdrop".

    1267 Geertruida, provisional designation 1930 HD, is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by astronomer Hendrik van Gent at Johannesburg Observatory in 1930, the asteroid was later named after Geertruid Pels, sister of Dutch astronomer Gerrit Pels.

    1183 Jutta, provisional designation 1930 DC, is a dark Nysian asteroid and slow rotator from the inner regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg Observatory on 22 February 1930. Any reference of its name to a person is unknown.

    References

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    2. ↑ Thomas Henry Huxley (1897) Universal Dictionary of the English Language
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    5. 1 2 "Asteroid 1233 Kobresia – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
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    12. 1 2 3 4 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. S2CID   35447010.
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    18. ↑ Schmadel, Lutz D. (2007). "(1054) Forsytia". Dictionary of Minor Planet Names – (1054) Forsytia. Springer Berlin Heidelberg. p. 90. doi:10.1007/978-3-540-29925-7_1055. ISBN   978-3-540-00238-3.
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