Asteroids

1865 Cerberus help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.576

Aphelion (Q)

1.584

Eccentricity (e)

0.467

Inclination (i)

16.1

deg

Orbit period (P)

409.9

Earth MOID

0.15648

U parameter

0.0

A₂

-8.6

10^-15au/days²

Next Earth close approach

Date

2044-11-25

Nominal distance (from Earth center)

0.17093

25570293

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)

6.800

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.079953

1-sigma variation

2.783E-9

Unit

Eccentricity (e)

Value

0.466868

1-sigma variation

3.121E-8

Unit

Inclination (i)

Value

16.1013

1-sigma variation

3.288E-6

Unit

Long. of Ascending Node (Ω)

Value

212.8811

1-sigma variation

8.755E-6

Unit

Arg. of Perihelion (ω)

Value

325.2951

1-sigma variation

9.450E-6

Unit

Mean Anomaly (M)

Value

135.31138

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.575757

1-sigma variation

Unit

Aphelion distance

Value

1.584149

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.394871

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.375851

1-sigma variation

Unit

MOID

Value

0.156476

1-sigma variation

Unit

Orbit Period

Value

409.9263

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-8.55975

1-sigma variation

3.03313

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	7.74740E-18	-9.30296E-18	9.73271E-16	-2.30099E-16	-3.89433E-15	-1.38142E-14	7.93573E-9
e	-9.30296E-18	9.74191E-16	4.41803E-15	-7.69838E-15	4.01443E-14	-3.95053E-14	-1.00112E-8
i	9.73271E-16	4.41803E-15	1.08097E-11	-8.28376E-12	6.28450E-12	-7.03237E-13	7.23560E-7
Ω	-2.30099E-16	-7.69838E-15	-8.28376E-12	7.66432E-11	-7.32354E-11	2.63080E-12	1.28455E-8
ω	-3.89433E-15	4.01443E-14	6.28450E-12	-7.32354E-11	8.93059E-11	-1.80929E-11	-4.12659E-6
M	-1.38142E-14	-3.95053E-14	-7.03237E-13	2.63080E-12	-1.80929E-11	6.94296E-11	-1.22471E-5
A₂	7.93573E-9	-1.00112E-8	7.23560E-7	1.28455E-8	-4.12659E-6	-1.22471E-5	9.19989E0

Date of computation: 2026-06-04 23:11 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

6.800

6.804

6.810

6.802

Unit

Source

[3]

[2]

[9]

[1]

Quality

Value

Unit

Source

[9]

Amplitude

Value

1.58

1.65

1.48-2.1

1.56

Unit

mag

Source

[1]

[2]

[9]

[3]

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

16.717

16.965

Unit

mag

Source

[10]

[11]

Slope Parameter (G)

Value

0.232

0.15**

Unit

Source

[12]

[10]

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]

Download this part as:

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.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 4. Skiff, Brian A et al.
[3]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2018 July-September, B.D. Warner
[4]	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)
[5]	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)
[6]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[7]	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)
[8]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[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]	ESA Aegis	ESA orbit determination and impact monitoring system
[11]	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)
[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

19761

Unit

Source

[1]

Unobserved

Value

218

Unit

Source

[1]

Normalized RMS of residuals

Value

0.477176

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

2025-12-02.656002

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

2337 (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

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Computation parameters

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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	0.1709269	0.1709260	0.0000003
EARTH	2053-11-24 20:46	< 1 min	0.1644806	0.1644796	0.0000004
EARTH	2099-11-26 21:05	< 1 min	0.1716824	0.1716756	0.0000023
EARTH	2108-11-25 21:11	< 1 min	0.1661391	0.1661325	0.0000022

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
274.28113538	322.46516134	0.15658575	MINIMUM
72.07077646	176.64174070	0.26481200	MINIMUM
352.35125531	63.79935288	0.44141728	SADDLE
174.04816185	255.00320320	0.61586861	SADDLE
0.66278301	257.30689284	1.57572975	SADDLE
182.64382720	80.12373094	2.57420594	MAXIMUM

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MOID Plots

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