525 Adelaide

525 Adelaide
Discovery
Discovered by	Joel Hastings Metcalf
Discovery site	Taunton, Massachusetts
Discovery date	21 October 1908
Designations
MPC designation	(525) Adelaide
Pronunciation	/ˈædəleɪd/
Alternative designations	1908 EKa; 1930 FX;; 1937 JG; 1955 SE1;; 1955 UF
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	107.13 yr (39129 d)
Aphelion	2.4746 AU (370.19 Gm)
Perihelion	2.0157 AU (301.54 Gm)
Semi-major axis	2.2452 AU (335.88 Gm)
Eccentricity	0.10218
Orbital period (sidereal)	3.36 yr (1228.8 d)
Mean anomaly	311.640°
Mean motion	0° 17m 34.728s / day
Inclination	5.9953°
Longitude of ascending node	203.410°
Argument of perihelion	264.252°
Physical characteristics
Synodic rotation period	19.967 h (0.8320 d)
Absolute magnitude (H)	12.53

525 Adelaide is an S-type asteroid^[1] belonging to the Flora family in the Main Belt. It was discovered 21 October 1908 by Joel Hastings Metcalf.

Previously, the object A904 EB, discovered 14 March 1904 by Max Wolf, had been named 525 Adelaide but was subsequently lost. When it was rediscovered 3 October 1930 by Sylvain Arend as 1930 TA, it was named 1171 Rusthawelia. Some 28 years passed before the two objects were realized to be the same. 1930 TA retained the name Rusthawelia (and discovery credited to Arend); the name 525 Adelaide was reused for the object 1908 EKa.

Another confusion occurred in 1929, one year before Arend's discovery, when American astronomer Anne Sewell Young thought to have found long-lost "Adelide", when in fact she mistook the asteroid for comet 31P/Schwassmann–Wachmann that had a very similar orbital eccentricity.^[2]

References

^ "525 Adelaide (1908 EKa)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.
^ "Long 'Lost' Planet Found Masquerading as Comet". Oakland Tribune. 21 June 1929. p. 31. Retrieved 9 November 2017 – via Newspapers.com.

External links

525 Adelaide at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
525 Adelaide at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an S-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it.

[jpldata-1] "525 Adelaide (1908 EKa)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.

[Young-1929-2] "Long 'Lost' Planet Found Masquerading as Comet". Oakland Tribune. 21 June 1929. p. 31. Retrieved 9 November 2017 – via Newspapers.com.

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