447P/Sheppard-Tholen
메타데이터
| 항목 |
값 |
| Designation |
447P/Sheppard-Tholen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-01T11:34:43.152960Z |
| Orbit solution date (soln_date, UTC) |
2022-12-23T17:43:31Z |
| Obs used |
75 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
16.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2008-10-09T08:24:27.648000Z |
| Discovery magnitude (MPC) |
22.60 V |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-05-24.0000000 |
| e |
0.18072317 |
| q (au) |
4.665883 |
| a (au) |
5.695124 |
| i (deg) |
7.414149 |
| Ω (om, deg) |
302.834446 |
| ω (w, deg) |
95.085999 |
| M (ma, deg) |
222.542292 |
밝기
산란 + 전체 선형
$$
M_a = (7.659 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.659 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.773 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-02-03 00:00 |
10:27:50.79 |
+04:48:00.8 |
HIP 51344 |
23.44 |
| 2026-02-03 12:00 |
10:27:38.07 |
+04:48:47.6 |
HIP 51344 |
26.62 |
| 2026-02-04 00:00 |
10:27:25.26 |
+04:49:35.1 |
HIP 51344 |
29.85 |
| 2026-02-04 12:00 |
10:27:12.37 |
+04:50:23.3 |
HIP 51032 |
29.37 |
| 2026-02-05 00:00 |
10:26:59.39 |
+04:51:12.2 |
HIP 51032 |
27.22 |
| 2026-02-05 12:00 |
10:26:46.34 |
+04:52:01.7 |
HIP 51032 |
25.32 |
| 2026-02-06 00:00 |
10:26:33.22 |
+04:52:51.9 |
HIP 51032 |
23.75 |
| 2026-02-06 12:00 |
10:26:20.02 |
+04:53:42.8 |
HIP 51017 |
22.34 |
| 2026-02-07 00:00 |
10:26:06.75 |
+04:54:34.2 |
HIP 51017 |
19.63 |
| 2026-02-07 12:00 |
10:25:53.41 |
+04:55:26.3 |
HIP 51017 |
17.15 |
| 2026-02-08 00:00 |
10:25:40.00 |
+04:56:19.0 |
HIP 51017 |
15.04 |
| 2026-02-08 12:00 |
10:25:26.52 |
+04:57:12.4 |
HIP 51017 |
13.48 |
| 2026-02-09 00:00 |
10:25:12.99 |
+04:58:06.3 |
HIP 51017 |
12.69 |
| 2026-02-09 12:00 |
10:24:59.39 |
+04:59:00.7 |
HIP 51017 |
12.84 |
| 2026-02-10 00:00 |
10:24:45.73 |
+04:59:55.8 |
HIP 51017 |
13.90 |
| 2026-02-10 12:00 |
10:24:32.02 |
+05:00:51.4 |
HIP 51017 |
15.70 |
| 2026-02-11 00:00 |
10:24:18.25 |
+05:01:47.6 |
HIP 51017 |
18.03 |
| 2026-02-11 12:00 |
10:24:04.43 |
+05:02:44.3 |
HIP 51017 |
20.72 |
| 2026-02-12 00:00 |
10:23:50.56 |
+05:03:41.5 |
HIP 51017 |
23.66 |
| 2026-02-12 12:00 |
10:23:36.64 |
+05:04:39.2 |
HIP 51017 |
26.76 |
| 2026-02-13 00:00 |
10:23:22.68 |
+05:05:37.4 |
HIP 51017 |
29.98 |
| 2026-02-13 12:00 |
10:23:08.68 |
+05:06:36.1 |
HIP 51017 |
33.29 |
| 2026-02-14 00:00 |
10:22:54.63 |
+05:07:35.3 |
HIP 50870 |
34.44 |
| 2026-02-14 12:00 |
10:22:40.55 |
+05:08:35.0 |
HIP 50628 |
33.51 |
| 2026-02-15 00:00 |
10:22:26.43 |
+05:09:35.1 |
HIP 50628 |
30.27 |
| 2026-02-15 12:00 |
10:22:12.28 |
+05:10:35.6 |
HIP 50639 |
26.98 |
| 2026-02-16 00:00 |
10:21:58.09 |
+05:11:36.6 |
HIP 50639 |
23.35 |
| 2026-02-16 12:00 |
10:21:43.88 |
+05:12:37.9 |
HIP 50639 |
19.73 |
| 2026-02-17 00:00 |
10:21:29.65 |
+05:13:39.7 |
HIP 50639 |
16.13 |
| 2026-02-17 12:00 |
10:21:15.39 |
+05:14:41.8 |
HIP 50639 |
12.58 |
| 2026-02-18 00:00 |
10:21:01.11 |
+05:15:44.4 |
HIP 50639 |
9.12 |
| 2026-02-18 12:00 |
10:20:46.81 |
+05:16:47.2 |
HIP 50639 |
5.97 |
| 2026-02-19 00:00 |
10:20:32.50 |
+05:17:50.4 |
HIP 50639 |
3.95 |
| 2026-02-19 12:00 |
10:20:18.17 |
+05:18:54.0 |
HIP 50639 |
4.81 |
| 2026-02-20 00:00 |
10:20:03.84 |
+05:19:57.8 |
HIP 50639 |
7.64 |
| 2026-02-20 12:00 |
10:19:49.49 |
+05:21:02.0 |
HIP 50639 |
11.02 |
| 2026-02-21 00:00 |
10:19:35.14 |
+05:22:06.4 |
HIP 50639 |
14.57 |
| 2026-02-21 12:00 |
10:19:20.79 |
+05:23:11.1 |
HIP 50639 |
18.19 |
| 2026-02-22 00:00 |
10:19:06.44 |
+05:24:16.1 |
HIP 50428 |
19.52 |
| 2026-02-22 12:00 |
10:18:52.09 |
+05:25:21.3 |
HIP 50428 |
16.13 |
| 2026-02-23 00:00 |
10:18:37.74 |
+05:26:26.7 |
HIP 50428 |
12.94 |
| 2026-02-23 12:00 |
10:18:23.40 |
+05:27:32.3 |
HIP 50428 |
10.13 |
| 2026-02-24 00:00 |
10:18:09.07 |
+05:28:38.2 |
HIP 50428 |
8.11 |