Asteroids

35396 1997XF11 help

Last update: 2025-12-31 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.745

Aphelion (Q)

2.140

Eccentricity (e)

0.484

Inclination (i)

4.1

deg

Orbit period (P)

632.7

Earth MOID

0.00033

U parameter

0.0

Next Earth close approach

Date

2028-10-26

Nominal distance (from Earth center)

0.00621

929235

Maximum Brightness

8.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

700

Taxonomic type

Rotation period (T)

3.257

Discovery Information

Discovery Date

1997-12-06

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.442362

1-sigma variation

1.202E-9

Unit

Eccentricity (e)

Value

0.483780

1-sigma variation

1.155E-8

Unit

Inclination (i)

Value

4.0989

1-sigma variation

2.793E-6

Unit

Long. of Ascending Node (Ω)

Value

213.6339

1-sigma variation

1.851E-5

Unit

Arg. of Perihelion (ω)

Value

103.0661

1-sigma variation

1.883E-5

Unit

Mean Anomaly (M)

Value

139.72254

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.744576

1-sigma variation

Unit

Aphelion distance

Value

2.140148

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.232939

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.002070

1-sigma variation

Unit

MOID

Value

0.000331

1-sigma variation

Unit

Orbit Period

Value

632.7175

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.44433E-18	-1.04165E-17	7.37422E-16	2.84958E-16	1.67532E-15	-6.53515E-15
e	-1.04165E-17	1.33404E-16	3.09747E-17	-2.04847E-14	-2.70704E-15	4.75408E-14
i	7.37422E-16	3.09747E-17	7.80212E-12	3.53291E-12	-3.33562E-12	-1.00932E-12
Ω	2.84958E-16	-2.04847E-14	3.53291E-12	3.42787E-10	-3.46454E-10	4.97297E-12
ω	1.67532E-15	-2.70704E-15	-3.33562E-12	-3.46454E-10	3.54562E-10	-1.40925E-11
M	-6.53515E-15	4.75408E-14	-1.00932E-12	4.97297E-12	-1.40925E-11	3.04404E-11

Date of computation: 2025-12-31 13:01 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

3.257

Unit

Source

[5]

Quality

Value

Unit

Source

[5]

Amplitude

Value

0.52-0.93

Unit

mag

Source

[5]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Xk,K

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.962

16.77

Unit

mag

Source

[6]

[7]

Slope Parameter (G)

Value

0.15**

Unit

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.7727

Unit

Source

[8]

Diameter

Value

700

Unit

Source

[8]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Radar R

Unit

Source

[9]

[10]

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Sources

No.	Name	Additional
[1]	EARN	1.) Lazzarin, M., Marchi,S. & Magrin, S. (2010) href="http://www.astro.unipd.it/planets/sineo/data.html"> SINEO Database (Spectroscopic Investiation of Near-Earth Objects)
[2]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[3]	EARN	1.) Binzel, R.P. et al. (2004) Meteorit. Planet. Sci. 39, 351-366. (Dynamical and compositional assessment of near-Earth object mission targets) (new spectra and taxonomy of 22 NEOs) 2.) Lazzarin, M., Marchi,S. & Magrin, S. (2010) href="http://www.astro.unipd.it/planets/sineo/data.html"> SINEO Database (Spectroscopic Investiation of Near-Earth Objects)
[4]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[5]	EARN	1.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 2.) R. Behrend Courbes des lumiere, Observatoire de Geneve website 3.) Slivan, S.M. et al. (2003) M.P.B. 30, 29-30. (35396) 4.) Mas Martinez, V. et al. (2016) MPB 43, 283-284. (LIGHTCURVES FOR TWO NEAR-EARTH-ASTEROIDS BY ASTEROIDS OBSERVERS (OBAS) - MPPD: 2016 APRIL - MAY)(35396,154555) 5.) Warner, B.D. (2016) MPB 43, 311-319. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2016 APRIL-JULY)(31 NEAs)
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	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.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods"
[8]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs) 2.) Trilling, D.E.; Mommert, M.; Hora, J.; Chesley, S.; et al. (2016) Astron. J. 152, A172.
[9]	EARN	1.) Binzel, R.P. et al. (2004) Meteorit. Planet. Sci. 39, 351-366. (Dynamical and compositional assessment of near-Earth object mission targets) (new spectra and taxonomy of 22 NEOs) 2.) deLeon, J. et al. (2010) Astron. Astrophys 517, A23. (Observations, compositional, and physical characterization of near-Earth and Mars-crosser asteroids from a spectroscopic survey)
[10]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

13065

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.501335

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1990-03-22.44427

Unit

Source

[2]

Last Observation

Value

2025-12-28.80009

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

2376 (10)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2002-10-25

Unit

Source

[3]

Last Observation

Value

2016-06-12

Unit

Source

[3]

Delay (Discarded)

Value

5 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

6 (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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 35396 1997XF11 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	1957-10-25 07:37	< 1 min	0.0153517	0.0153499	0.0000006
EARTH	1971-05-19 04:27	< 1 s	0.0316710	0.0316708	0.0000001
EARTH	1997-05-08 22:00	< 1 s	0.1555088	0.1555085	0.0000001
EARTH	2002-10-31 00:37	< 1 s	0.0636143	0.0636143	0.0000000
EARTH	2016-06-10 16:11	< 1 min	0.1799848	0.1799846	0.0000001
EARTH	2028-10-26 06:42	< 1 min	0.0062116	0.0062110	0.0000002
EARTH	2035-06-08 20:25	3.2	0.1747494	0.1747243	0.0000084
EARTH	2040-11-04 15:21	1.4	0.1526195	0.1525592	0.0000201
EARTH	2078-05-10 21:05	3.4	0.1231946	0.1230637	0.0000436
EARTH	2083-10-09 16:26	9.4	0.1553214	0.1552301	0.0000304
EARTH	2090-05-19 15:10	2.1	0.0370569	0.0370203	0.0000122
EARTH	2095-10-27 01:02	2.2	0.0130957	0.0130317	0.0000213
EARTH	2102-05-19 16:36	26.5	0.0325389	0.0322157	0.0001101
EARTH	2107-10-15 01:46	158.0	0.1346678	0.1326170	0.0006836
EARTH	2114-05-12 17:00	95.3	0.1052839	0.1017332	0.0011853

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
50.03307045	293.01013396	0.00033133	MINIMUM
307.57235912	134.94017408	0.02896725	MINIMUM
358.28639704	213.25388579	0.27729865	SADDLE
179.43284791	34.82587489	1.15793680	SADDLE
358.61950307	33.80937630	1.73009671	SADDLE
179.54967939	214.88700023	3.15343689	MAXIMUM

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MOID Plots

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