Asteroids with Satellites Database--Johnston's Archive
(363027)
1998 ST27
compiled by Wm. Robert Johnston
last updated
12 October 2024
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:
NEA, Aten
(PHA)
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
0.8198135939 AU
| |
orbital period P: |
0.7423024182 yr
(= 271.12595823 d)
| |
eccentricity e: |
0.529784517
| |
perihelion distance q: |
0.385489045 AU
| |
aphelion distance Q: |
1.2541381428 AU
| |
inclination i: |
21.0568548°
| |
argument of perihelion ω: |
322.4300048°
| |
ascending node Ω: |
197.5235152°
| |
mean anomaly M: |
277.29328°
| |
perihelion passage TP: |
2024 Dec 18.2887185
| |
Epoch: |
2024 Oct 17
| |
data arc: |
1998-2021
(593 obs.)
| |
Earth MOID: |
0.00992383 AU
| |
Jupiter Tisserand invariant TJ: |
6.975
|
orbital data, secondary:
|
semimajor axis as: |
4.5
± 0.5 km
[M03b]
| |
separation/primary radius as/rp: | 17 ± 3.5 [M03b] | |
separation/Hill radius as/rH: | 0.19 [*E] | |
orbital period Ps: |
5
d [B24f]
| |
eccentricity es: |
>0.3
[B03b]
| |
normalized ang. mom. αL: |
?
|
orbital data, tertiary:
|
semimajor axis as: |
<2 km
[B24q]
| |
separation/primary radius as/rp: | <5 [*D] | |
separation/Hill radius as/rH: | 0.08 [*E] | |
orbital period Ps: |
<1.2
d [*E]
| |
eccentricity es: |
? | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
19.64
[MPC]
19.575 ± 0.49 [JPL]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.81
km [*D]
| |
geometric albedo: |
0.05
[B03b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
24 km [*E]
|
other data, primary:
|
diameter dp: |
0.8
km [B03b]
| |
axial ratios a/b, b/c: | 1.1 [*E] | |
rotation period RPp: |
3
h [B24q]
| |
amplitude in mag., rotational ΔM: |
0.1
[W23f]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.12
km [B03b]
| |
diameter ratio ds/dp: |
0.15
[*D]
| |
component mag. difference ΔM: |
4.1
[*D]
| |
rotation period RPs: |
<6
h [B03b]
| |
|
other data, tertiary:
|
diameter ds: |
<0.05
km [B24q]
| |
diameter ratio ds/dp: |
<0.06
[*D]
| |
component mag. difference ΔM: |
>6.0
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(363027) 1998 ST27
--discovery and notes:
Primary discovered
1998 Sep 24
from
Socorro, New Mexico, USA
by
LINEAR Program.
Permanent number assigned 2013 Jun 23.
Second component discovered
2001 Oct 07
by L. A. M. Benner, M. C. Nolan, S. J. Ostro, J. D. Giorgini, and J. L. Margot
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2001 Oct 09 [B01b].
Third component discovered
2024 Oct
by L. A. M. Benner, et al.
using
radar
observations from Goldstone Observatory, Puerto Rico.
Announced
2024 Oct 11 [B24q].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Jacobson, Seth A., Scheeres, Daniel J., & McMahon, Jay 2014, The Astrophysical Journal Formation of the Wide Asynchronous Binary Asteroid Population
- Fang, Julia & Margot, Jean-Luc 2012, The Astronomical Journal The Role of Kozai Cycles in Near-Earth Binary Asteroids
- Brozović, Marina, Benner, Lance A. M., Taylor, Patrick A., Nolan, Michael C., Howell, Ellen S., Magri, Christopher, Scheeres, Daniel J., Giorgini, Jon D., Pollock, Joseph T., Pravec, Petr, Galád, Adrián, Fang, Julia, Margot, Jean-Luc, Busch, Michael W., Shepard, Michael K., Reichart, Daniel E., Ivarsen, Kevin M., Haislip, Joshua B., LaCluyze, Aaron P., Jao, Joseph, Slade, Martin A., Lawrence, Kenneth J., & Hicks, Michael D. 2011, Icarus Radar and optical observations and physical modeling of triple near-Earth Asteroid (136617) 1994 CC
- Abell, P. A., Gaffey, M. J., Hardersen, P. S., Vilas, F., Jarvis, K. S., & Landis, R. R. 2005, Bulletin of the American Astronomical Society Compositions of Binary Near-Earth Objects: Implications for the Internal Structure of Their Parent Bodies
- Benner, L. A. M. 2005, Society for Astronomical Sciences Annual Symposium Recent Arecibo and Goldstone Radar Imaging of Near-Earth Asteroids
- Abell, P. A., Gaffey, M. J., & Hardersen, P. S. 2004, Bulletin of the American Astronomical Society Compositional Results of Binary Near-Earth Asteroid 2003 YT1: A Basaltic Achondrite
- Benner, L. A. M., Nolan, M. C., Margot, J. L., Ostro, S. J., & Giorgini, J. D. 2003, Bulletin of the American Astronomical Society Radar Imaging of Binary Near-Earth Asteroid 1998 ST27
- Abell, Paul A. 2003, Ph.D. Thesis Near-IR reflectance spectroscopy of mainbelt and near-Earth objects: A study of their compositions, meteorite affinities, and source regions
- Abell, P. A., Gaffey, M. J., & Hardersen, P. S. 2002, Lunar and Planetary Science Conference A Detailed Compositional Investigation of the Potentially Hazardous Asteroid 1998 ST27
- Benner, L. A. M., Nolan, M. C., Margot, J. L., Ostro, S. J., & Giorgini, J. D. 2003, AAS/Division for Planetary Sciences Meeting Radar Imaging of Binary Near-Earth Asteroid 1998 ST27
- Abell, P. A., Gaffey, M. J., & Hardersen, P. S. 2002, Lunar and Planetary Institute Conference Abstracts A Detailed Compositional Investigation of the Potentially Hazardous Asteroid 1998 ST27
- Benner, L. A. M., Nolan, M. C., Ostro, S. J., Giorgini, J. D., & Margot, J. L. 2001, International Astronomical Union Circular 1998 ST_27
- Ticha, J., Tichy, M., Moravec, Z., Spratt, C. E., Balam, D. D., & Marsden, B. G. 2001, Minor Planet Electronic Circ., 2001-S28 (2001). 1998 ST27
- Ticha, J., Tichy, M., Moravec, Z., Garradd, G. J., Zoltowski, F. B., Pravec, P., Sarounova, L., Kubat, J., Blythe, M., Shelly, F., Bezpalko, M., Stuart, J., Viggh, H., Sayer, R., & Williams, G. V. 1998, Minor Planet Electronic Circ., 1998-S34 (1998). 1998 ST27
©
2001-2014, 2024
by Wm. Robert Johnston.
Last modified
12 October 2024.
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