메타데이터
| 항목 |
값 |
| Designation |
485P/Sheppard-Tholen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-10-10T02:23:33.267840Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T17:21:52Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
19.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2006-01-02T08:50:54.816000Z |
| Discovery magnitude (MPC) |
20.30 V |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-04-12.0000000 |
| e |
0.41586197 |
| q (au) |
3.995838 |
| a (au) |
6.840572 |
| i (deg) |
10.009723 |
| Ω (om, deg) |
261.841751 |
| ω (w, deg) |
195.918921 |
| M (ma, deg) |
70.508521 |
밝기
산란 + 전체 선형
$$
M_a = (9.238 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.238 |
| n |
6.000 |
| gf |
0.937 |
| gb |
-0.857 |
| k |
1.000 |
| δ90 |
2.963 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
12:38:50.55 |
-14:36:42.2 |
HIP 61651 |
34.07 |
| 2026-06-01 12:00 |
12:38:48.64 |
-14:35:35.0 |
HIP 61651 |
32.87 |
| 2026-06-02 00:00 |
12:38:46.88 |
-14:34:28.6 |
HIP 61651 |
31.70 |
| 2026-06-02 12:00 |
12:38:45.27 |
-14:33:23.1 |
HIP 61651 |
30.55 |
| 2026-06-03 00:00 |
12:38:43.81 |
-14:32:18.4 |
HIP 61651 |
29.42 |
| 2026-06-03 12:00 |
12:38:42.50 |
-14:31:14.5 |
HIP 61651 |
28.31 |
| 2026-06-04 00:00 |
12:38:41.33 |
-14:30:11.4 |
HIP 61651 |
27.22 |
| 2026-06-04 12:00 |
12:38:40.31 |
-14:29:09.2 |
HIP 61651 |
26.16 |
| 2026-06-05 00:00 |
12:38:39.44 |
-14:28:07.8 |
HIP 61651 |
25.11 |
| 2026-06-05 12:00 |
12:38:38.71 |
-14:27:07.2 |
HIP 61651 |
24.09 |
| 2026-06-06 00:00 |
12:38:38.13 |
-14:26:07.5 |
HIP 61651 |
23.09 |
| 2026-06-06 12:00 |
12:38:37.70 |
-14:25:08.7 |
HIP 61651 |
22.11 |
| 2026-06-07 00:00 |
12:38:37.41 |
-14:24:10.8 |
HIP 61651 |
21.15 |
| 2026-06-07 12:00 |
12:38:37.28 |
-14:23:13.7 |
HIP 61651 |
20.22 |
| 2026-06-08 00:00 |
12:38:37.29 |
-14:22:17.4 |
HIP 61651 |
19.31 |
| 2026-06-08 12:00 |
12:38:37.44 |
-14:21:22.1 |
HIP 61651 |
18.42 |
| 2026-06-09 00:00 |
12:38:37.75 |
-14:20:27.6 |
HIP 61651 |
17.57 |
| 2026-06-09 12:00 |
12:38:38.20 |
-14:19:34.0 |
HIP 61651 |
16.75 |
| 2026-06-10 00:00 |
12:38:38.79 |
-14:18:41.3 |
HIP 61651 |
15.96 |
| 2026-06-10 12:00 |
12:38:39.54 |
-14:17:49.5 |
HIP 61651 |
15.20 |
| 2026-06-11 00:00 |
12:38:40.43 |
-14:16:58.6 |
HIP 61651 |
14.49 |
| 2026-06-11 12:00 |
12:38:41.46 |
-14:16:08.5 |
HIP 61651 |
13.83 |
| 2026-06-12 00:00 |
12:38:42.64 |
-14:15:19.4 |
HIP 61651 |
13.22 |
| 2026-06-12 12:00 |
12:38:43.97 |
-14:14:31.2 |
HIP 61651 |
12.67 |
| 2026-06-13 00:00 |
12:38:45.45 |
-14:13:43.9 |
HIP 61651 |
12.19 |
| 2026-06-13 12:00 |
12:38:47.07 |
-14:12:57.5 |
HIP 61651 |
11.78 |
| 2026-06-14 00:00 |
12:38:48.83 |
-14:12:12.1 |
HIP 61651 |
11.47 |
| 2026-06-14 12:00 |
12:38:50.75 |
-14:11:27.5 |
HIP 61651 |
11.25 |
| 2026-06-15 00:00 |
12:38:52.80 |
-14:10:43.9 |
HIP 61651 |
11.13 |
| 2026-06-15 12:00 |
12:38:55.01 |
-14:10:01.2 |
HIP 61651 |
11.11 |
| 2026-06-16 00:00 |
12:38:57.35 |
-14:09:19.4 |
HIP 61651 |
11.21 |
| 2026-06-16 12:00 |
12:38:59.84 |
-14:08:38.6 |
HIP 61651 |
11.41 |
| 2026-06-17 00:00 |
12:39:02.48 |
-14:07:58.7 |
HIP 61651 |
11.73 |
| 2026-06-17 12:00 |
12:39:05.26 |
-14:07:19.7 |
HIP 61651 |
12.14 |
| 2026-06-18 00:00 |
12:39:08.18 |
-14:06:41.7 |
HIP 61651 |
12.64 |
| 2026-06-18 12:00 |
12:39:11.25 |
-14:06:04.6 |
HIP 61651 |
13.23 |
| 2026-06-19 00:00 |
12:39:14.45 |
-14:05:28.4 |
HIP 61651 |
13.90 |
| 2026-06-19 12:00 |
12:39:17.80 |
-14:04:53.2 |
HIP 61651 |
14.64 |
| 2026-06-20 00:00 |
12:39:21.29 |
-14:04:18.9 |
HIP 61651 |
15.45 |
| 2026-06-20 12:00 |
12:39:24.93 |
-14:03:45.5 |
HIP 61651 |
16.32 |
| 2026-06-21 00:00 |
12:39:28.70 |
-14:03:13.1 |
HIP 61853 |
16.57 |
| 2026-06-21 12:00 |
12:39:32.61 |
-14:02:41.6 |
HIP 61853 |
15.73 |
| 2026-06-22 00:00 |
12:39:36.66 |
-14:02:11.1 |
HIP 61853 |
14.90 |