409 Aspasia

409 Aspasia
	Lightcurve-base 3D-model of Aspasia on the top with an image of the asteroid on the bottom.
Discovery
Discovered by	Auguste Charlois
Discovery date	9 December 1895
Designations
MPC designation	(409) Aspasia
Pronunciation	/æˈspeɪʒ(i)ə/
Named after	Aspasia
Alternative designations	1895 CE
Minor planet category	Main belt
Adjectives	Aspasian
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	120.33 yr (43952 d)
Aphelion	2.7640 AU (413.49 Gm)
Perihelion	2.3865 AU (357.02 Gm)
Semi-major axis	2.5752 AU (385.24 Gm)
Eccentricity	0.073284
Orbital period (sidereal)	4.13 yr (1509.5 d)
Mean anomaly	260.362°
Mean motion	0° 14m 18.564s / day
Inclination	11.262°
Longitude of ascending node	242.19°
Argument of perihelion	353.72°
Physical characteristics
Dimensions	161.61±6.8 km ; 176.33 ± 4.50 km
Mass	(1.18 ± 0.23) × 1019 kg
Mean density	4.10 ± 0.84 g/cm3
Synodic rotation period	9.022 h (0.3759 d); 9.021 h
Geometric albedo	0.0606±0.005
Absolute magnitude (H)	7.62

Last updated November 29, 2025

409 Aspasia is a large main-belt asteroid that was discovered by French astronomer Auguste Charlois on 9 December 1895 in Nice. It is classified as a CX-type asteroid.^[5]

Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado, during 2007–8 gave a light curve with a period of 9.021455 ± 0.000009 hours.^[4] This is consistent with previous results.^[5]

References

↑ "Aspasia". Merriam-Webster.com Dictionary . Merriam-Webster.
1 2 3 Yeomans, Donald K., "409 Aspasia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 20 January 2016, retrieved 10 May 2016.
1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
1 2 Warner, Brian D.; et al. (October 2008), "Shape and Spin Models for Four Asteroids", The Minor Planet Bulletin, 35 (4): 167–171, Bibcode:2008MPBu...35..167W.
1 2 Piironen, J.; et al. (March 1998), "Physical studies of asteroids. XXXII. Rotation periods and UBVRI-colours for selected asteroids", Astronomy and Astrophysics Supplement, 128 (3): 525–540, Bibcode:1998A&AS..128..525P, doi: 10.1051/aas:1998393 .

External links

Lightcurve plot of 409 Aspasia ^{[ dead link ]}, Palmer Divide Observatory, B. D. Warner (2008)
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
409 Aspasia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
409 Aspasia at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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[1] "Aspasia". Merriam-Webster.com Dictionary . Merriam-Webster.

[JPL-2] 1 2 3 Yeomans, Donald K., "409 Aspasia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 20 January 2016, retrieved 10 May 2016.

[Carry2012-3] 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.

[Warner2008-4] 1 2 Warner, Brian D.; et al. (October 2008), "Shape and Spin Models for Four Asteroids", The Minor Planet Bulletin, 35 (4): 167–171, Bibcode:2008MPBu...35..167W.

[aas128_525-5] 1 2 Piironen, J.; et al. (March 1998), "Physical studies of asteroids. XXXII. Rotation periods and UBVRI-colours for selected asteroids", Astronomy and Astrophysics Supplement, 128 (3): 525–540, Bibcode:1998A&AS..128..525P, doi: 10.1051/aas:1998393 .

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Discovery
Lightcurve-base 3D-model of Aspasia on the top with an image of the asteroid on the bottom.
Discovered by	Auguste Charlois
Discovery date	9 December 1895
Designations
MPC designation	(409) Aspasia
Pronunciation	/æˈspeɪʒ(i)ə/ ^[1]
Named after	Aspasia
Alternative designations	1895 CE
Minor planet category	Main belt
Adjectives	Aspasian
Orbital characteristics ^[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	120.33 yr (43952 d)
Aphelion	2.7640 AU (413.49 Gm)
Perihelion	2.3865 AU (357.02 Gm)
Semi-major axis	2.5752 AU (385.24 Gm)
Eccentricity	0.073284
Orbital period (sidereal)	4.13 yr (1509.5 d)
Mean anomaly	260.362°
Mean motion	0° 14^m 18.564^s / day
Inclination	11.262°
Longitude of ascending node	242.19°
Argument of perihelion	353.72°
Physical characteristics
Dimensions	161.61±6.8 km ^[2] 176.33 ± 4.50 km^[3]
Mass	(1.18 ± 0.23) × 10¹⁹ kg^[3]
Mean density	4.10 ± 0.84 g/cm³^[3]
Synodic rotation period	9.022 h (0.3759 d)^[2] 9.021 h^[4]
Geometric albedo	0.0606±0.005
Absolute magnitude (H)	7.62