878 Mildred

Last updated

878 Mildred
Discovery  [1] [2]
Discovered by S. B. Nicholson
H. Shapley
Discovery site Mount Wilson Obs.
Discovery date6 September 1916
Designations
(878) Mildred
1916 f, 1985 VG6, 1991 GZ8
main-belt Nysa   [3]
Orbital characteristics   [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 99.57 yr (36368 days)
Aphelion 2.8953  AU (433.13  Gm)
Perihelion 1.8286 AU (273.55 Gm)
2.3619 AU (353.34 Gm)
Eccentricity 0.22580
3.63 yr (1325.9 d)
198.89°
0° 16m 17.472s / day
Inclination 2.0648°
172.83°
190.14°
Physical characteristics
Dimensions~4 km [4]
2.660  h (0.1108  d) [1]
S [3]
14.7 [1]

    878 Mildred is a minor planet in the main belt orbiting the Sun. It is the lowest numbered, and thus the namesake, of the Mildred family of asteroids, a subgroup of the Nysa family. [3] The Mildred subgroup, and by extension 878 Mildred itself, is thought to have been formed by a recent fragmentation event from a larger asteroid. [3]

    Contents

    Discovery

    878 Mildred was originally discovered in 1916 using the 1.5 m Hale Telescope at the Mount Wilson Observatory, but was subsequently lost until it was again observed on single nights in 1985 and 1991 (a lost asteroid). [2] Initially only two observations of the asteroid were taken on 1916-09-06 which does not allow for an accurate orbital determination, however interest in the object prompted further investigation and more measurements were taken in late September and October. [4] The asteroid was re-discovered in 1991 by Gareth V. Williams. [5] It is named after Mildred Shapley Matthews.

    Physical properties

    By comparing the asteroid's perceived brightness and the then computed distance from the Sun they arrived at an absolute visual magnitude of 14.3, which if one assumes Mars-like albedo gives an approximate diameter of 3 to 5 kilometers. [4]

    Related Research Articles

    <span class="mw-page-title-main">55 Pandora</span> Fairly large and very bright asteroid in the asteroid belt

    Pandora is a fairly large and very bright asteroid in the asteroid belt. Pandora was discovered by American astronomer and Catholic priest George Mary Searle on September 10, 1858, from the Dudley Observatory near Albany, NY. It was his first and only asteroid discovery.

    <span class="mw-page-title-main">142 Polana</span> Main-belt asteroid

    Polana is a very dark asteroid from the asteroid belt. It was discovered by Johann Palisa on January 28, 1875, and named after the city of Pola, home of the Austrian Naval Observatory where he made the discovery.

    <span class="mw-page-title-main">2062 Aten</span> Sub-kilometer asteroid

    2062 Aten, provisional designation 1976 AA, is a stony sub-kilometer asteroid and namesake of the Aten asteroids, a subgroup of near-Earth objects. The asteroid was named after Aten from Egyptian mythology.

    Hungaria is a relatively small asteroid orbiting in the inner asteroid belt. It is an E-type (high-albedo) asteroid. It is the namesake of the Hungaria asteroids, which orbit the Sun on the inside of the 1:4 Kirkwood gap, standing out of the core of the asteroid belt.

    Hamiltonia is an asteroid. It was discovered by James Edward Keeler on 6 December 1899, but was then lost until 1981. Its provisional name was 1899 FD. The asteroid is named for Mount Hamilton, the site of Lick Observatory where Keeler was working when he discovered the asteroid. It was the last asteroid discovery of the 1800s.

    Pamina is a minor planet orbiting the Sun in the main belt. It is named for the heroine of Mozart's opera, The Magic Flute. This asteroid was discovered by M. Wolf in 1904 at the Heidelberg observatory in Germany. It is orbiting at a distance of 2.74 AU from the Sun, with an orbital eccentricity (ovalness) of 0.212 and a period of 4.53 yr. The orbital plane is inclined at an angle of 6.8° to the ecliptic.

    815 Coppelia is a minor planet orbiting the Sun that was discovered by German astronomer Max Wolf on 2 February 1916 from Heidelberg named after Coppélia, a comic ballet.

    2751 Campbell, provisional designation 1962 RP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.

    7655 Adamries, provisional designation 1991 YM1, is a Nysa asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 28 December 1991, by German astronomer Freimut Börngen at Karl Schwarzschild Observatory in Tautenburg, eastern Germany. It was named after mathematician Adam Ries.

    1650 Heckmann, provisional designation 1937 TG, is a rare-type Nysian asteroid from the inner regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 11 October 1937, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and later named after astronomer Otto Heckmann.

    4435 Holt, provisional designation 1983 AG2, is a stony asteroid, sizable Mars-crosser and binary system from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 13 January 1983, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California, United States. It was later named after American astronomer Henry E. Holt. The discovery of its companion was announced in January 2018.

    9767 Midsomer Norton (1992 EB1) is an outer main-belt asteroid discovered on March 10, 1992, by Duncan Steel at Siding Spring. It is one of very few asteroids located in the 2:1 mean motion resonance with Jupiter.

    3963 Paradzhanov, provisional designation 1969 TP2, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 8 October 1969, by astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named after Soviet film director Sergei Parajanov (Sargis Paradzhanov) in 1996.

    3074 Popov, provisional designation 1979 YE9, is a carbonaceous Nysian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 24 December 1979, by Soviet–Russian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. The B-type asteroid has an unknown rotation period. It was named after Russian physicist Alexander Stepanovich Popov, an early radio pioneer in Russia.

    7866 Sicoli, provisional designation 1982 TK, is a stony Nysa asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 13 October 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after Italian astronomer Piero Sicoli.

    2391 Tomita, provisional designation 1957 AA, is a Nysian asteroid from the inner regions of the asteroid belt, approximately 15 kilometers in diameter. The asteroid was discovered on 9 January 1957, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after Japanese astronomer Kōichirō Tomita.

    <span class="mw-page-title-main">1537 Transylvania</span>

    1537 Transylvania, provisional designation 1940 QA, is a carbonaceous asteroid and long-lost minor planet from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. Discovered by Gyula Strommer in 1940, it was later named after region of Transylvania, where the discoverer was born.

    6117 Brevardastro, provisional designation 1985 CZ1, is a stony asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.

    185638 Erwinschwab, provisional designation 2008 EU7, is a potentially sub-kilometer Nysian asteroid from the inner regions of the asteroid belt. It was discovered on 1 March 2008, by OAM-astronomers at the La Sagra Observatory in southern Spain. The asteroid is estimated to measure between 950 meters and 1.8 kilometers in diameter and was named after German astronomer Erwin Schwab in 2009.

    <span class="mw-page-title-main">246P/NEAT</span>

    246P/NEAT is a periodic comet discovered on 2004 March 28 by Near-Earth Asteroid Tracking (NEAT) using the 1.2-metre (47 in) reflector at Haleakala. It was given the permanent number 246P on 2011 January 14.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 878 Mildred (1916 f)" (2015-04-10 last obs). Retrieved 3 May 2016.
    2. 1 2 IAU Circular: IAUC 5275. Central Bureau for Astronomical Telegrams (Report). IAU. 25 May 1991. Retrieved 20 February 2020.
    3. 1 2 3 4 Cellino, A.; et al. (August 2001). "The Puzzling Case of the Nysa–Polana Family". Icarus . 152 (2): 225–237. Bibcode:2001Icar..152..225C. doi:10.1006/icar.2001.6634.
    4. 1 2 3 Shapley, H.; Nicholson, S. B. (1917). "The Orbit and Probable Size of a Very Faint Asteroid (878) Mildred". Astronomical Journal . 30 (710): 127–128. Bibcode:1917AJ.....30..127S. doi: 10.1086/104199 .
    5. ↑ "MPC staff - Gareth Williams". Minor Planet Center. International Astronomical Union . Retrieved 26 August 2014.


    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.