Asteroids

1865 Cerberus help

Last update: 2026-09-28 13:00 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.576

Aphelion (Q)

1.584

Eccentricity (e)

0.467

Inclination (i)

16.1

deg

Orbit period (P)

410.0

Earth MOID

0.15663

U parameter

0.0

A₂

-8.7

10^-15au/days²

Next Earth close approach

Date

2044-11-25

Nominal distance (from Earth center)

0.17093

25570291

Maximum Brightness

15.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

16.7

mag

Diameter

1610

Taxonomic type

Rotation period (T)

6.802

Discovery Information

Discovery Date

1971-10-26

Observatory

Hamburg-Bergedorf

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.079995

1-sigma variation

2.514E-9

Unit

Eccentricity (e)

Value

0.466926

1-sigma variation

3.084E-8

Unit

Inclination (i)

Value

16.1014

1-sigma variation

3.274E-6

Unit

Long. of Ascending Node (Ω)

Value

212.8788

1-sigma variation

8.419E-6

Unit

Arg. of Perihelion (ω)

Value

325.2917

1-sigma variation

9.054E-6

Unit

Mean Anomaly (M)

Value

310.96538

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.575718

1-sigma variation

Unit

Aphelion distance

Value

1.584272

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.394002

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.376976

1-sigma variation

Unit

MOID

Value

0.156635

1-sigma variation

Unit

Orbit Period

Value

409.9502

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-8.68695

1-sigma variation

2.81917

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	6.31991E-18	-1.52752E-17	6.33836E-16	-1.67020E-16	-2.76502E-15	-1.22124E-14	6.61807E-9
e	-1.52752E-17	9.51130E-16	3.42486E-15	-4.00371E-15	4.09981E-14	-2.39192E-14	-1.51136E-8
i	6.33836E-16	3.42486E-15	1.07165E-11	-8.54882E-12	6.84128E-12	-2.52277E-13	4.26634E-7
Ω	-1.67020E-16	-4.00371E-15	-8.54882E-12	7.08794E-11	-6.72374E-11	1.78327E-12	-6.24887E-9
ω	-2.76502E-15	4.09981E-14	6.84128E-12	-6.72374E-11	8.19803E-11	-1.91029E-11	-2.94447E-6
M	-1.22124E-14	-2.39192E-14	-2.52277E-13	1.78327E-12	-1.91029E-11	6.87141E-11	-1.10679E-5
A₂	6.61807E-9	-1.51136E-8	4.26634E-7	-6.24887E-9	-2.94447E-6	-1.10679E-5	7.94771E0

Date of computation: 2026-09-28 13:00 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

6.802

6.800

6.810

6.804

Unit

Source

[1]

[2]

[9]

[4]

Quality

Value

Unit

Source

[9]

Amplitude

Value

1.65

1.48-2.1

1.56

1.58

Unit

mag

Source

[4]

[9]

[2]

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

334

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[5]

[6]

Taxonomy (all)

Value

Unit

Source

[7]

[8]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.965

16.717

Unit

mag

Source

[10]

[11]

Slope Parameter (G)

Value

0.15**

0.232

Unit

Source

[11]

[12]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.112

Unit

Source

[14]

Diameter

Value

1610

Unit

Source

[13]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.79

0.4

Unit

B-V

U-B

Source

[15]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Unit

Source

[16]

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Sources

No.	Name	Additional
[1]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 July-September, 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.) Durech, J. et al. (2012) Astron. Astrophy 547, A10. (Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect)
[4]	EARN	1.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 4. Skiff, Brian A et al.
[5]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[6]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[7]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[8]	EARN	1.) Tholen, D.J. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.), Univ.Ariz.Press, Tucson, USA, pp. 1139-1150. 2.) Bus, S.J. & Binzel, R.P. (2002) Icarus 158,106-145. (Phase II of the Small Main-Belt Asteroid Spectrographic Survey: A Feature-Based Taxonomy.) 3.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 4.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects) 5.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[9]	EARN	1.) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids) 2.) Wisniewski, W.Z. et al. (1995) LPSC XXVI, 1511-1512. (Photoelectric Observations of 125 Asteroids) 3.) Harris, A.W. & J.W. Young (1989) Icarus 81, 314-364. (Asteroid lightcurve observations from 1979-1981) 4.) Harris, A.W. & J.W. Young (1983) Icarus 54, 59-109. (Asteroid rotation. IV) 5.) Harris, A.W. & J.W. Young (1980) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/03500/03540.html"> 3540. ((1865) Cerberus rotation period) 6.) Sarneczky, K. et al. (1999) Astron. Astrophys. Suppl. Ser. 137, 363-368. (CCD observations of 11 faint asteroids)(1089, 1452, 2415, 9262, 1998 FM5, 1989 UR; 792, 1508, 1604, 1865; 1727) 7.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 8.) Szabo, Gy. & L.L. Kiss (2001) Publ. Astron. Dept Eotvos Univ. Nr. 11, 119-124. (CCD photometric investigations of small bodies in the solar system; 1627,1865) 9.) Szabo, Gy.M. et al. (2001) Astron. & Astrophys. 375, 285-292. (Photometric observations of 9 Near-Earth Objects) (699,1865,1866,11405,16064,1999JD6,1999ND43,2000GK137, 2000NM) 10.) Skiff, B.A. et al. (2012) MPB 39, 111-130. (LOWELL OBSERVATORY NEAR-EARTH ASTEROID PHOTOMETRIC SURVEY (NEAPS) - 2008 MAY THROUGH 2008 DECEMBER) (46 NEAs)
[10]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations) 2.) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids)
[11]	ESA Aegis	ESA orbit determination and impact monitoring system
[12]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)
[13]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations) 2.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 3.) Veeder, G.J. et al. (1989) Astron. J. 97, 1211-1219. (Radiometry of near-earth asteroids) 4.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012. 5.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[14]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations) 2.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 3.) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs) 4.) Veeder, G.J. et al. (1989) Astron. J. 97, 1211-1219. (Radiometry of near-earth asteroids) 5.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012. 6.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[15]	EARN	1.) Tedesco, E.F. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.), Univ.Ariz.Press, Tucson, USA, pp. 1090-1138.
[16]	EARN	1.) Bus, S.J. & Binzel, R.P. (2002) Icarus 158,106-145. (Phase II of the Small Main-Belt Asteroid Spectrographic Survey: A Feature-Based Taxonomy.) 2.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 3.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

20057

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.472204

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1971-10-26.9313

Unit

Source

[2]

Last Observation

Value

2026-09-24.535046

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

2405 (9)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

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Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Plot

Computation parameters

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Final Date: *

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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 1865 Cerberus 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	1989-11-25 18:40	< 1 s	0.1689299	0.1689296	0.0000001
EARTH	1998-11-24 17:54	< 1 s	0.1634037	0.1634035	0.0000001
EARTH	2044-11-25 18:53	< 1 s	0.1709268	0.1709261	0.0000003
EARTH	2053-11-24 20:46	< 1 min	0.1644806	0.1644797	0.0000003
EARTH	2099-11-26 21:05	< 1 min	0.1716823	0.1716761	0.0000021
EARTH	2108-11-25 21:11	< 1 min	0.1661392	0.1661332	0.0000020

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
274.31792879	320.80885712	0.15663494	MINIMUM
71.60978189	174.46720432	0.26331586	MINIMUM
352.00488977	61.72982454	0.44008569	SADDLE
173.97726395	253.24807658	0.61744233	SADDLE
0.35379830	255.30417045	1.57409943	SADDLE
182.53961559	78.34960815	2.57242803	MAXIMUM

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MOID Plots

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