![]() | |
Discovery [1] | |
---|---|
Discovered by | A. Borrelly |
Discovery site | Marseille |
Discovery date | 1 August 1877 |
Designations | |
(173) Ino | |
Pronunciation | /ˈaɪnoʊ/ EYE-noh [2] |
Named after | Ἰνώ Īnṓ [3] (Greek mythology) |
A877 PA; 1922 SB | |
main-belt
[1]
[4] · (
middle) Ino [5] | |
Adjectives | Inoan ( /aɪˈnoʊən/ eye-NOH-ən) [6] |
Orbital characteristics [4] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 138.75 yr (50,678 d) |
Aphelion | 3.3142 AU |
Perihelion | 2.1708 AU |
2.7425 AU | |
Eccentricity | 0.2085 |
4.54 yr (1,659 d) | |
307.27 ° | |
0° 13m 1.2s / day | |
Inclination | 14.197° |
148.18° | |
228.89° | |
Physical characteristics | |
Dimensions | c/a = 0.76±0.06 [7] |
145±3 km
[7] 119±27 km [8] 125.8±1.5 km [9] 148±42 km [10] 154.1±3.5 km [11] 160.6 km [12] | |
Mass | (2.2±1.3)×1018 kg
[7] (4.79±3.11)×1018 kg [13] |
Mean
density | 1.4±0.8 g/cm3
[7] 2.23±1.47 g/cm3 [13] |
5.93
h
[14] 6.1±0.2 h [15] 6.106±0.001 h [15] 6.1088±0.0007 h [15] 6.11 h [16] 6.113±0.002 h [17] 6.11651 h [18] 6.15 h [19] 6.163 h [20] | |
0.061 (calculated)
[7] 0.059 [12] 0.06±0.02 [10] 0.0642±0.003 [11] 0.07±0.05 [8] 0.096±0.018 [9] | |
Tholen =
C
[4] SMASS = Xk [4] B–V = 0.705 [4] U–B = 0.305 [4] | |
7.66
[4]
[9]
[10]
[11]
[12]
[21] 7.80±0.05 [22] 7.90 [8] [23] | |
Ino ( minor planet designation: 173 Ino) is a large asteroid and the parent body of the Ino family, located in the central regions of the asteroid belt, approximately 150 kilometers (93 miles) in diameter. It was discovered on 1 August 1877, by French astronomer Alphonse Borrelly at Marseille Observatory in southern France, and named after the queen Ino from Greek mythology. [1] [3] The dark Xk-type asteroid has a rotation period of 6.15 hours. [21]
Ino is the parent body and namesake of the Ino family ( 522), [5] an asteroid family in the intermediate main belt with nearly 500 known members. [24]: 23 The adjectival form of the asteroid name is "Inoan".
It orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 6 months (1,659 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.21 and an inclination of 14 ° with respect to the ecliptic. [4] The body's observation arc begins at Düsseldorf-Bilk Observatory in January 1879, five months after its official discovery observation at Marseilles. [1]
In the Tholen classification, Ino is a common carbonaceous C-type, while in the SMASS classification it is a Xk-subtype that transitions between the X-type and uncommon K-type asteroids. [4]
Multiple photometric studies of this asteroid were performed between 1978 and 2002. The combined data gave an irregular, asymmetrical light curve with a period of 6.163 ± 0.005 hours and a brightness variation of 0.10–0.15 in magnitude. The asteroid is rotating in a retrograde direction. [18]
![]() | |
Discovery [1] | |
---|---|
Discovered by | A. Borrelly |
Discovery site | Marseille |
Discovery date | 1 August 1877 |
Designations | |
(173) Ino | |
Pronunciation | /ˈaɪnoʊ/ EYE-noh [2] |
Named after | Ἰνώ Īnṓ [3] (Greek mythology) |
A877 PA; 1922 SB | |
main-belt
[1]
[4] · (
middle) Ino [5] | |
Adjectives | Inoan ( /aɪˈnoʊən/ eye-NOH-ən) [6] |
Orbital characteristics [4] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 138.75 yr (50,678 d) |
Aphelion | 3.3142 AU |
Perihelion | 2.1708 AU |
2.7425 AU | |
Eccentricity | 0.2085 |
4.54 yr (1,659 d) | |
307.27 ° | |
0° 13m 1.2s / day | |
Inclination | 14.197° |
148.18° | |
228.89° | |
Physical characteristics | |
Dimensions | c/a = 0.76±0.06 [7] |
145±3 km
[7] 119±27 km [8] 125.8±1.5 km [9] 148±42 km [10] 154.1±3.5 km [11] 160.6 km [12] | |
Mass | (2.2±1.3)×1018 kg
[7] (4.79±3.11)×1018 kg [13] |
Mean
density | 1.4±0.8 g/cm3
[7] 2.23±1.47 g/cm3 [13] |
5.93
h
[14] 6.1±0.2 h [15] 6.106±0.001 h [15] 6.1088±0.0007 h [15] 6.11 h [16] 6.113±0.002 h [17] 6.11651 h [18] 6.15 h [19] 6.163 h [20] | |
0.061 (calculated)
[7] 0.059 [12] 0.06±0.02 [10] 0.0642±0.003 [11] 0.07±0.05 [8] 0.096±0.018 [9] | |
Tholen =
C
[4] SMASS = Xk [4] B–V = 0.705 [4] U–B = 0.305 [4] | |
7.66
[4]
[9]
[10]
[11]
[12]
[21] 7.80±0.05 [22] 7.90 [8] [23] | |
Ino ( minor planet designation: 173 Ino) is a large asteroid and the parent body of the Ino family, located in the central regions of the asteroid belt, approximately 150 kilometers (93 miles) in diameter. It was discovered on 1 August 1877, by French astronomer Alphonse Borrelly at Marseille Observatory in southern France, and named after the queen Ino from Greek mythology. [1] [3] The dark Xk-type asteroid has a rotation period of 6.15 hours. [21]
Ino is the parent body and namesake of the Ino family ( 522), [5] an asteroid family in the intermediate main belt with nearly 500 known members. [24]: 23 The adjectival form of the asteroid name is "Inoan".
It orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 6 months (1,659 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.21 and an inclination of 14 ° with respect to the ecliptic. [4] The body's observation arc begins at Düsseldorf-Bilk Observatory in January 1879, five months after its official discovery observation at Marseilles. [1]
In the Tholen classification, Ino is a common carbonaceous C-type, while in the SMASS classification it is a Xk-subtype that transitions between the X-type and uncommon K-type asteroids. [4]
Multiple photometric studies of this asteroid were performed between 1978 and 2002. The combined data gave an irregular, asymmetrical light curve with a period of 6.163 ± 0.005 hours and a brightness variation of 0.10–0.15 in magnitude. The asteroid is rotating in a retrograde direction. [18]