Asteroids

1998DK36 help

Last update: 2025-03-28 15:40 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Atira

Perihelion (q)

0.405

Aphelion (Q)

0.980

Eccentricity (e)

0.415

Inclination (i)

2.0

deg

Orbit period (P)

210.6

Earth MOID

0.00888

U parameter

9.0

Next Earth close approach

Date

2028-03-08

Nominal distance (from Earth center)

0.14303

21397575

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

28 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1998-02-23

Observatory

Maunakea

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.692658

1-sigma variation

0.064068

Unit

Eccentricity (e)

Value

0.415128

1-sigma variation

0.018964

Unit

Inclination (i)

Value

2.0482

1-sigma variation

5.2514

Unit

Long. of Ascending Node (Ω)

Value

150.8711

1-sigma variation

27.0740

Unit

Arg. of Perihelion (ω)

Value

180.7313

1-sigma variation

28.6130

Unit

Mean Anomaly (M)

Value

255.89852

1-sigma variation

274.04900

Unit

Perihelion distance

Value

0.405116

1-sigma variation

Unit

Aphelion distance

Value

0.980199

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.008885

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.605503

1-sigma variation

Unit

MOID

Value

0.008884

1-sigma variation

Unit

Orbit Period

Value

210.5602

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.10475E-3	-1.20681E-3	3.36084E-1	1.73446E0	-1.83266E0	1.75579E1
e	-1.20681E-3	3.59625E-4	-9.93465E-2	-5.09213E-1	5.37307E-1	-5.16192E0
i	3.36084E-1	-9.93465E-2	2.75772E1	1.41931E2	-1.49885E2	1.43756E3
Ω	1.73446E0	-5.09213E-1	1.41931E2	7.33004E2	-7.74615E2	7.41910E3
ω	-1.83266E0	5.37307E-1	-1.49885E2	-7.74615E2	8.18702E2	-7.83917E3
M	1.75579E1	-5.16192E0	1.43756E3	7.41910E3	-7.83917E3	7.51030E4

Date of computation: 2025-02-19 13:28 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

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

24.893

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

28 - 60*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

1.0

Unit

Source

[1]

Unobserved

Value

9894

Unit

Source

[1]

Normalized RMS of residuals

Value

0.0723524

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1998-02-23.24201

Unit

Source

[2]

Last Observation

Value

1998-02-24.23795

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

4 (0)

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

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 1998DK36 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-03-07 10:19	> 1 mo	0.1319187	0.0000000	6.8483630
EARTH	1956-02-22 20:44	> 1 mo	0.0104532	0.0037921	0.6679092
EARTH	1960-02-02 19:32	> 1 mo	0.0798197	0.0048504	2.2164193
VENUS	1964-05-13 22:40	> 1 w	0.0331698	0.0058688	0.9552409
EARTH	1971-03-08 03:51	> 1 mo	0.1709094	0.0045322	2.7152844
EARTH	1975-03-04 16:57	> 1 mo	0.0439699	0.0000000	3.0769388
MERCURY	1975-12-27 02:44	> 1 mo	0.0485411	0.0467980	0.9044878
EARTH	1979-02-11 09:31	> 1 mo	0.0185432	0.0005245	1.9871735
VENUS	1979-07-19 02:14	> 1 mo	0.0442674	0.0229737	4.4355857
EARTH	1983-02-02 03:02	> 1 w	0.1451614	0.0045286	4.5528098
MERCURY	1986-05-06 16:58	> 1 mo	0.0489560	0.0473327	0.9970629
EARTH	1994-03-07 14:55	> 1 mo	0.0811819	0.0002257	1.4909876
EARTH	1998-02-14 23:37	> 1 d	0.0113395	0.0000826	0.0040479
VENUS	2000-01-18 16:13	> 1 mo	0.0401455	0.0000000	0.9845993
EARTH	2002-02-02 04:27	> 1 w	0.1432855	0.0049518	1.5699055
VENUS	2006-08-11 23:56	> 1 mo	0.0346211	0.0241864	1.4779183
EARTH	2013-03-06 07:08	> 1 mo	0.0579134	0.0006665	5.2612745
EARTH	2017-02-09 20:02	> 1 mo	0.0229719	0.0013210	3.8268865
EARTH	2021-02-02 13:35	> 1 mo	0.1832698	0.0072518	5.3769922
VENUS	2027-02-13 20:18	> 1 w	0.0189395	0.0000000	1.2590772
EARTH	2028-03-08 13:47	> 1 w	0.1430340	0.0136568	0.1798436
EARTH	2032-02-18 04:50	> 1 mo	0.0083911	0.0023537	0.4094700
EARTH	2036-02-03 10:07	> 1 mo	0.1796091	0.0038862	14.3507850
EARTH	2043-03-09 00:31	> 1 mo	0.0860043	0.0027914	23.5093458
EARTH	2047-02-07 06:05	> 1 mo	0.0373896	0.0025132	19.1373188
VENUS	2055-06-02 17:23	> 1 mo	0.0149901	0.0000000	13.4059057
EARTH	2058-03-03 18:46	> 1 mo	0.0310447	0.0011093	7.7460666
EARTH	2062-02-04 03:24	> 1 mo	0.0728605	0.0048664	34.8480659
VENUS	2064-08-24 05:28	> 1 mo	0.0171205	0.0000000	65.3421442
VENUS	2071-03-18 15:46	> 1 mo	0.0392286	0.0272569	47.4795945
EARTH	2073-03-09 04:53	> 1 mo	0.0966982	0.0030126	103.1528124
EARTH	2077-02-15 15:37	> 1 mo	0.0121581	0.0006395	42.5684194
VENUS	2080-06-08 05:52	> 1 mo	0.0445096	0.0278592	230.8170339
EARTH	2081-02-03 11:24	> 1 mo	0.1666064	0.0066533	299.4419225
EARTH	2088-03-09 12:16	> 1 mo	0.1595380	0.0053288	499.5592128
EARTH	2092-02-26 16:37	> 1 mo	0.0138014	0.0004732	179.1595700
EARTH	2096-02-04 23:01	> 1 mo	0.0844079	0.0046915	629.8139099
VENUS	2100-12-12 14:10	> 1 mo	0.0325095	0.0000000	949.8542286
EARTH	2107-03-11 05:14	> 1 mo	0.0991229	0.0082743	38.7349728
VENUS	2110-03-05 01:41	> 1 mo	0.0239728	0.0000000	336.6894388
MERCURY	2110-11-12 16:20	> 1 mo	0.0479877	0.0473643	37.6381543
EARTH	2111-02-18 03:38	> 1 mo	0.0117018	0.0017871	68.8718162
EARTH	2115-02-05 10:10	> 1 mo	0.1503617	0.0021951	638.4972905
VENUS	2116-09-26 20:43	> 1 mo	0.0401051	0.0281554	535.2197533
EARTH	2122-03-11 06:53	> 1 mo	0.1865989	0.0053792	1152.3938816
VENUS	2125-12-18 13:52	> 1 mo	0.0378670	0.0283471	722.1433149

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
178.47715487	48.02713821	0.00823396	MINIMUM
356.17228755	225.52427729	0.60597464	SADDLE
356.26880238	45.63662425	1.39321248	SADDLE
178.36454779	227.93896234	1.99094071	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out