astro.wikisort.org - Asteroid

1374 Isora, provisional designation 1935 UA, is a stony asteroid and eccentric Mars-crosser from the innermost regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 21 October 1935, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium.[3]

1374 Isora

Discovery[1]
Discovered by	E. Delporte
Discovery site	Uccle Obs.
Discovery date	21 October 1935
Designations
MPC designation	(1374) Isora
Named after	Constructed female name ("Rosi" spelled backwards)[2]
Alternative designations	1935 UA
Minor planet category	Mars-crosser[1][3][4]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc	81.05 yr (29,604 days)
Aphelion	2.8775 AU
Perihelion	1.6230 AU
Semi-major axis	2.2502 AU
Eccentricity	0.2788
Orbital period (sidereal)	3.38 yr (1,233 days)
Mean anomaly	44.987°
Mean motion	0° 17m 31.2s / day
Inclination	5.2943°
Longitude of ascending node	302.56°
Argument of perihelion	60.988°
Earth MOID	0.6290 AU
Physical characteristics
Dimensions	5.48 km (derived)[4]
Synodic rotation period	8±2 h[5] 36.699±0.001 h[6]
Geometric albedo	0.20 (assumed)[4]
Spectral type	SMASS = Sq[1] · S[4][7][8]
Absolute magnitude (H)	13.00[8] · 13.3[1] · 13.32±0.32[7] · 13.67±0.15[4][5]

Orbit and classification

In the SMASS taxonomy, Isora is classified as a Sq-type, an intermediary between the abundant S and rather rare Q-type asteroids. It orbits the Sun at a distance of 1.6–2.9 AU once every 3 years and 5 months (1,233 days). Its orbit has an eccentricity of 0.28 and an inclination of 5° with respect to the ecliptic.[1] Isora's observation arc begins with its official discovery observation at Uccle, as no precoveries were taken and no prior identifications were made.[3]

Physical characteristics

In January 2014, a rotational light-curve of Isora was obtained by American astronomer Robert D. Stephens at the Center for Solar System Studies (CS3) in California. Light-curve analysis gave a longer than average rotation period of 36.699 hours with a brightness variation of 0.12 magnitude (U=2+). However, a second period solution of 18.35 hours is also possible.[6] The result supersedes photometric observations taken by Wiesław Z. Wiśniewski in 1989, which rendered a fragmentary light-curve with a period of 8 hours (U=1).[5]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 5.48 kilometers using an absolute magnitude of 13.67.[4]

Naming

Isora is the backwards spelled feminine name "Rosi" with an appended "a".[2] Naming was proposed by Gustav Stracke (1887–1943) – astronomer at the German Astronomisches Rechen-Institut, and after whom the minor planet 1019 Strackea is named – and first cited by Paul Herget in his The Names of the Minor Planets in 1955 (H 125).[2]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1374 Isora at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1374 Isora at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

---

[de] (1374) Isora

(1374) Isora ist ein Asteroid des Hauptgürtels, der am 21. Oktober 1935 vom belgischen Astronomen Eugène Joseph Delporte in Ukkel entdeckt wurde.

---

- [en] 1374 Isora

---

[ru] (1374) Изора

(1374) Изора (лат. Isora) — астероид, относящийся к группе астероидов пересекающих орбиту Марса, который принадлежит к светлому спектральному классу S. Он был обнаружен 26 сентября 1933 года бельгийским астрономом Эженом Дельпортом в обсерватории Уккел. Название происходит от женского имени Rosi, прочитанного с конца[1].

---

---