154 Bertha

Last updated

154 Bertha
000154-asteroid shape model (154) Bertha.png
Discovery [1]
Discovered by P. M. Henry
Discovery date4 November 1875
Designations
(154) Bertha
Pronunciation /ˈbɜːrθə/ [2]
A875 VD
Main belt
Orbital characteristics [3] [4]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 130.75 yr (47758 d)
Aphelion 3.44  AU (515.21  Gm)
Perihelion 2.95 AU (441.30 Gm)
3.20 AU (478.26 Gm)
Eccentricity 0.077261
5.72 years (2,087.9 d)
Average orbital speed
16.63 km/s
125.046°
0° 10m 20.734s / day
Inclination 20.9724°
36.7441°
159.722°
Earth  MOID 1.95 AU (291.94 Gm)
Jupiter  MOID 1.53 AU (229.03 Gm)
TJupiter 3.087
Physical characteristics
Dimensions184.93±3.6  km [3]
186.85±1.83 km [5]
Mass (9.19±5.20)×1018 kg [5]
Mean density
2.69±1.52 g/cm3 [5]
Equatorial surface gravity
0.0517 m/s²
Equatorial escape velocity
0.0978 km/s
25.224  h (1.0510  d) [3] [6]
0.0480±0.002 [3]
0.0483 ± 0.0107 [7]
Temperature ~156 K
C [7]
7.58, [3] 7.530 [7]

    Bertha (minor planet designation: 154 Bertha) is a main-belt asteroid. It was discovered by the French brothers Paul Henry and Prosper Henry on 4 November 1875, but the credit for the discovery was given to Prosper. It is probably named after Berthe Martin-Flammarion, sister of the astronomer Camille Flammarion. [8]

    Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado in during 2007 produced a light curve with a period of 22.30 ± 0.03 hours and a brightness range of 0.10 ± 0.02 in magnitude. A 1998 measurement gave a value of 27.6 hours, which doesn't fit the PDO data. [9] In 2011, observations from the Organ Mesa Observatory in Las Cruces, New Mexico were used to determine a rotation period of 25.224 ± 0.002 hours with a brightness variability of 0.10 ± 0.01 magnitude, ruling out previous studies. [6]

    This is classified as a C-type asteroid [7] and it has an estimated diameter of about 187 km. [5]

    Related Research Articles

    <span class="mw-page-title-main">164 Eva</span> Main-belt asteroid

    164 Eva is a main-belt asteroid that was discovered by the French brothers Paul Henry and Prosper Henry on July 12, 1876, in Paris. The reason the name Eva was chosen remains unknown. The orbital elements for 164 Eva were published in 1877 by American astronomer Winslow Upton. It is categorized as a C-type asteroid and is probably composed of primitive carbonaceous chondritic materials.

    <span class="mw-page-title-main">193 Ambrosia</span> Asteroid in the main belt of asteroids

    Ambrosia is a main belt asteroid that was discovered by the Corsican-born French astronomer J. Coggia on February 28, 1879, and named after Ambrosia, the food of the gods in Greek mythology.

    <span class="mw-page-title-main">273 Atropos</span> Asteroid orbiting the Sun in the main belt of asteroids

    Atropos is a typical Main belt asteroid that was discovered by Austrian astronomer Johann Palisa on 8 March 1888 in Vienna.

    <span class="mw-page-title-main">275 Sapientia</span> Main-belt asteroid

    Sapientia is a very large Main belt asteroid that was discovered by Johann Palisa on 15 April 1888 in Vienna. It is classified as a C-type asteroid and is probably composed of carbonaceous material. It is named for the Roman personification of wisdom, Sapientia.

    <span class="mw-page-title-main">314 Rosalia</span> Main belt asteroid

    Rosalia is a large Main belt asteroid. It was discovered by Auguste Charlois on 1 September 1891 in Nice.

    Cheruskia is a minor planet, specifically an asteroid orbiting in the asteroid belt that was discovered by German astronomer Paul Götz on 26 July 1905 from Heidelberg.

    <span class="mw-page-title-main">572 Rebekka</span> Minor planet orbiting the Sun

    Rebekka is a minor planet orbiting the Sun, which was discovered on September 19, 1905, by a German astronomer Paul Götz in Heidelberg. It was named after a young lady from Heidelberg, and may have been inspired by the asteroid's provisional designation 1905 RB.

    Bilkis is a minor planet, specifically an asteroid orbiting in the asteroid belt. It was discovered by German astronomer August Kopff in 1906 February and was given the Koran name for the Queen of Sheba. Photometric observations at the Palmer Divide Observatory in Colorado Springs, Colorado in 2006–7 were used to build a light curve for this object. The asteroid displayed a rotation period of 8.5742 ± 0.0005 hours and a brightness variation of 0.40 ± 0.02 in magnitude.

    <span class="mw-page-title-main">605 Juvisia</span> Minor planet that orbits in the asteroid belt

    Juvisia is a minor planet, specifically an asteroid orbiting in the asteroid belt that was discovered 27 August 1906 in Heidelberg by German astronomer Max Wolf. It was named after the commune Juvisy-sur-Orge, France, where French astronomer Camille Flammarion had his observatory.

    607 Jenny is a minor planet, specifically an asteroid orbiting in the asteroid belt that was discovered by German astronomer August Kopff on September 18, 1906.

    620 Drakonia is a minor planet, specifically an asteroid orbiting in the asteroid belt. It was discovered October 26, 1906, in Taunton, Massachusetts, by American astronomer Joel Hastings Metcalf and given the preliminary designation 1906 WE. It may have been named for Drake University.

    630 Euphemia is a mid-sized Eunomian asteroid.

    687 Tinette is a minor planet, specifically an asteroid orbiting primarily in the asteroid belt. It was discovered by Austrian astronomer Johann Palisa on 16 August 1909 from Vienna and was given the preliminary designation 1909 HG.

    <span class="mw-page-title-main">708 Raphaela</span> Minor planet orbiting the Sun

    708 Raphaela is a minor planet orbiting the Sun.

    <span class="mw-page-title-main">747 Winchester</span> Asteroid orbiting the Sun

    747 Winchester is an asteroid, a minor planet orbiting the Sun. It was discovered in 1913, and is named after the town in which it was discovered, Winchester, Massachusetts, in the USA.

    756 Lilliana is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on 26 April 1908 from Taunton, Massachusetts. It rotates around its axis of rotation every 9.36 hours.

    860 Ursina is a minor planet orbiting the Sun that was discovered in 1917 by German astronomer Max Wolf. The origin of the name is unknown.

    880 Herba is a minor planet orbiting the Sun that was discovered by German astronomer Max Wolf on 22 July 1917 in Heidelberg.

    947 Monterosa is a minor planet orbiting the Sun.

    999 Zachia is a main-belt asteroid that was discovered by German astronomer Karl W. Reinmuth in 1923 and named after Hungarian astronomer Franz Xaver von Zach.

    References

    1. "Discovery Circumstances: Numbered Minor Planets". International Astronomical Union - Minor Planet Center.
    2. "Bertha" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    3. 1 2 3 4 5 Yeomans, Donald K., "154 Bertha", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 12 May 2016.
    4. "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
    5. 1 2 3 4 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    6. 1 2 Pilcher, Frederick (April 2012), "Rotation Period Determinations for 31 Euphrosyne, 65 Cybele, 154 Bertha 177 Irma, 200 Dynamene, 724 Hapag, 880 Herba, and 1470 Carla", The Minor Planet Bulletin, vol. 39, no. 2, pp. 57–60, Bibcode:2012MPBu...39...57P.
    7. 1 2 3 4 Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode:2012LPICo1667.6089P. See Table 4.
    8. Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 27, ISBN   3642297188.
    9. Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory", The Minor Planet Bulletin, Bibcode:2007MPBu...34...72W.