Asteroids

4183 Cuno help

Last update: 2026-08-07 13:15 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.721

Aphelion (Q)

3.241

Eccentricity (e)

0.636

Inclination (i)

6.7

deg

Orbit period (P)

1018.5

Earth MOID

0.02836

U parameter

0.0

Next Earth close approach

Date

2051-06-09

Nominal distance (from Earth center)

0.19533

29220959

Maximum Brightness

13.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

14.2

mag

Diameter

4000 - 8000*

Taxonomic type

Rotation period (T)

3.577

Discovery Information

Discovery Date

1959-06-05

Observatory

Boyden Observatory, Bloemfontein

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.981069

1-sigma variation

8.165E-10

Unit

Eccentricity (e)

Value

0.636199

1-sigma variation

1.440E-8

Unit

Inclination (i)

Value

6.6696

1-sigma variation

1.917E-6

Unit

Long. of Ascending Node (Ω)

Value

294.3426

1-sigma variation

1.861E-5

Unit

Arg. of Perihelion (ω)

Value

237.0114

1-sigma variation

1.869E-5

Unit

Mean Anomaly (M)

Value

28.07406

1-sigma variation

2.896E-6

Unit

Perihelion distance

Value

0.720715

1-sigma variation

Unit

Aphelion distance

Value

3.241423

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.788005

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.107993

1-sigma variation

Unit

MOID

Value

0.028357

1-sigma variation

Unit

Orbit Period

Value

1018.4688

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.66735E-19	6.01227E-18	1.14184E-16	-3.46248E-15	3.52564E-15	-1.51693E-15
e	6.01227E-18	2.07394E-16	1.08672E-15	1.76693E-14	-1.23413E-14	-1.91365E-15
i	1.14184E-16	1.08672E-15	3.67522E-12	-2.79677E-12	2.83373E-12	-4.12253E-14
Ω	-3.46248E-15	1.76693E-14	-2.79677E-12	3.46512E-10	-3.45465E-10	4.89776E-12
ω	3.52564E-15	-1.23413E-14	2.83373E-12	-3.45465E-10	3.49492E-10	-9.02289E-12
M	-1.51693E-15	-1.91365E-15	-4.12253E-14	4.89776E-12	-9.02289E-12	8.38548E-12

Date of computation: 2026-08-07 13:15 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

3.577

3.580

Unit

Source

[1]

[2]

Quality

Value

Unit

Source

[-]

Amplitude

Value

0.09

0.1

Unit

mag

Source

[2]

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[3]

[4]

Taxonomy (all)

Value

Unit

Source

[5]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

14.237

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[7]

Diameter

Value

4000 - 8000*

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.4243

-0.019

0.0674

-0.086

0.4584

0.3627

Unit

g-r

r-z

r-i

i-z

g-i

g-z

Source

[4]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 September-2020 January, B.D. Warner
[2]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2018 July-September, B.D. Warner
[3]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[4]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[5]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

24533

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.413927

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1959-06-05.95391

Unit

Source

[2]

Last Observation

Value

2026-08-06.390096

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

5279 (33)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2000-12-18

Unit

Source

[3]

Last Observation

Value

2000-12-18

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

1 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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Final Date: *

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Max residual (arcsec):

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Computation parameters

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Final Date: *

Output option:

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Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 4183 Cuno from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1959-05-09 15:53	< 1 min	0.1881275	0.1881270	0.0000002
EARTH	2000-12-22 19:02	< 1 s	0.1426534	0.1426533	0.0000000
EARTH	2012-05-20 19:12	< 1 s	0.1218255	0.1218252	0.0000001
EARTH	2051-06-09 12:46	< 1 s	0.1953300	0.1953296	0.0000001
EARTH	2053-12-22 18:42	< 1 s	0.1536637	0.1536632	0.0000002
EARTH	2065-05-20 11:19	< 1 s	0.1279821	0.1279819	0.0000001
EARTH	2093-01-08 03:05	< 1 min	0.0842832	0.0842828	0.0000001
EARTH	2104-06-03 03:26	< 1 s	0.0981138	0.0981135	0.0000001
2 Pallas	2113-11-15 21:22	< 1 min	0.0157634	0.0157631	0.0000001
EARTH	2118-05-21 22:22	< 1 min	0.1327575	0.1327570	0.0000002

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
322.82087118	356.10735949	0.02835724	MINIMUM
40.49858467	142.64662390	0.08698500	MINIMUM
2.98577621	71.86039165	0.28650761	SADDLE
1.75272884	249.24391507	1.72493154	SADDLE
180.52247301	247.29000307	2.24181532	SADDLE
180.22627349	67.14611102	4.23133291	MAXIMUM

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MOID Plots

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