Cuno
Add to an observing list or journal →4183 Cuno (1959 LM)
Where is it now
- Distance from Sun
- 2.345 AU
- True anomaly
- 141.4°
- Distance from Earth
- 2.14 AU
- As of
- 11 October 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 19h 15m 13s
- Declination
- -19° 59′ 02″
- Constellation
- Sagittarius
- Distance from Earth
- 2.15 AU
- Elongation from the Sun
- 88.48° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 1.981 AU
- Eccentricity
- 0.6362
- Inclination
- 6.67°
- Orbital period
- 2.79 years
- Perihelion
- 0.721 AU
- Aphelion
- 3.241 AU
- Longitude of ascending node
- 294.34°
- Argument of periapsis
- 237.01°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 11.0 LD
- 0.0284 AU
- Tisserand (Jupiter)
- 3.572
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 5,446
- Data arc
- 67.34 years
- First observed
- 5 June 1959
- Last observed
- 8 October 2026
- Residual RMS
- 0.39 ″
- Solution · Otto Matic
- 9 October 2026
Physical properties
- Mean radius
- 1.83 km
- Rotation period
- 3.56 hours
Visual & observation
- Geometric albedo
- 0.097
- Absolute magnitude (H)
- 14.18
- Spectral type (SMASS)
- Sq
Discovery & classification
- Discovered by
- Hoffmeister, C.
- Discovery date
- 5 June 1959
- Discovery site
- Bloemfontein
Also known as 4183 · 1959 LM · 1986 VT7 · 1987 MB
Close approaches 35 on record
Top-down view of the ecliptic, Earth at the centre, for the 2051-06-09 12:47 UTC close approach of Cuno. Catalogue miss distance 76.0 LD · 2.92 × 10⁷ km. The curve is the geocentric path from 2051-06-06 to 2051-06-12, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2051-06-09 12:47:00 | Earth | 0.1953 AU | 76.0 LD | 22.1 km/s |
| 2053-12-22 18:43:00 | Earth | 0.1537 AU | 59.8 LD | 21.6 km/s |
| 2054-01-17 09:50:00 | Venus | 0.1357 AU | 52.8 LD | 17.2 km/s |
| 2058-04-29 00:22:00 | Juptr | 1.9204 AU | 747.4 LD | 4 km/s |
| 2065-05-20 11:20:00 | Earth | 0.128 AU | 49.8 LD | 14.1 km/s |
| 2093-01-08 03:06:00 | Earth | 0.0843 AU | 32.8 LD | 14.9 km/s |
| 2101-07-12 04:37:00 | Venus | 0.123 AU | 47.9 LD | 10.8 km/s |
| 2104-06-03 03:28:00 | Earth | 0.0981 AU | 38.2 LD | 18.6 km/s |
| 2105-09-23 01:02:00 | Juptr | 1.8814 AU | 732.2 LD | 4 km/s |
| 2118-05-21 22:23:00 | Earth | 0.1328 AU | 51.7 LD | 13.9 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB