메타데이터
| 항목 |
값 |
| Designation |
391P/Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-02-19T23:23:38.063040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:41Z |
| Obs used |
260 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-10-22T00:19:10.848000Z |
| Discovery magnitude (MPC) |
20.30 N |
| Discovery observatory (MPC) |
J22 · Tacande Observatory, La Palma |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-09-05.0000000 |
| e |
0.11982312 |
| q (au) |
4.119481 |
| a (au) |
4.680287 |
| i (deg) |
21.274626 |
| Ω (om, deg) |
124.762161 |
| ω (w, deg) |
186.884849 |
| M (ma, deg) |
19.275953 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:29:40.19 |
+08:13:23.4 |
HIP 75946 |
18.44 |
| 2026-05-12 12:00 |
15:29:23.29 |
+08:14:07.1 |
HIP 75946 |
21.70 |
| 2026-05-13 00:00 |
15:29:06.36 |
+08:14:49.0 |
HIP 75693 |
22.21 |
| 2026-05-13 12:00 |
15:28:49.42 |
+08:15:29.0 |
HIP 75693 |
18.27 |
| 2026-05-14 00:00 |
15:28:32.47 |
+08:16:07.2 |
HIP 75693 |
14.52 |
| 2026-05-14 12:00 |
15:28:15.51 |
+08:16:43.5 |
HIP 75693 |
11.15 |
| 2026-05-15 00:00 |
15:27:58.54 |
+08:17:17.9 |
HIP 75693 |
8.62 |
| 2026-05-15 12:00 |
15:27:41.57 |
+08:17:50.4 |
HIP 75693 |
7.79 |
| 2026-05-16 00:00 |
15:27:24.60 |
+08:18:21.0 |
HIP 75693 |
9.12 |
| 2026-05-16 12:00 |
15:27:07.63 |
+08:18:49.6 |
HIP 75637 |
10.65 |
| 2026-05-17 00:00 |
15:26:50.68 |
+08:19:16.4 |
HIP 75637 |
11.54 |
| 2026-05-17 12:00 |
15:26:33.73 |
+08:19:41.2 |
HIP 75637 |
13.75 |
| 2026-05-18 00:00 |
15:26:16.80 |
+08:20:04.0 |
HIP 75637 |
16.76 |
| 2026-05-18 12:00 |
15:25:59.89 |
+08:20:25.0 |
HIP 75637 |
20.21 |
| 2026-05-19 00:00 |
15:25:43.00 |
+08:20:43.9 |
HIP 75516 |
19.28 |
| 2026-05-19 12:00 |
15:25:26.13 |
+08:21:00.9 |
HIP 75394 |
18.19 |
| 2026-05-20 00:00 |
15:25:09.29 |
+08:21:15.9 |
HIP 75394 |
14.41 |
| 2026-05-20 12:00 |
15:24:52.49 |
+08:21:29.0 |
HIP 75394 |
10.96 |
| 2026-05-21 00:00 |
15:24:35.71 |
+08:21:40.1 |
HIP 75394 |
8.22 |
| 2026-05-21 12:00 |
15:24:18.98 |
+08:21:49.2 |
HIP 75394 |
7.08 |
| 2026-05-22 00:00 |
15:24:02.29 |
+08:21:56.3 |
HIP 75394 |
8.20 |
| 2026-05-22 12:00 |
15:23:45.64 |
+08:22:01.4 |
HIP 75394 |
10.90 |
| 2026-05-23 00:00 |
15:23:29.04 |
+08:22:04.6 |
HIP 75394 |
14.30 |
| 2026-05-23 12:00 |
15:23:12.49 |
+08:22:05.7 |
HIP 75394 |
17.99 |
| 2026-05-24 00:00 |
15:22:55.99 |
+08:22:04.9 |
HIP 75166 |
19.95 |
| 2026-05-24 12:00 |
15:22:39.55 |
+08:22:02.1 |
HIP 75166 |
16.06 |
| 2026-05-25 00:00 |
15:22:23.17 |
+08:21:57.3 |
HIP 75166 |
12.30 |
| 2026-05-25 12:00 |
15:22:06.86 |
+08:21:50.5 |
HIP 75166 |
8.84 |
| 2026-05-26 00:00 |
15:21:50.60 |
+08:21:41.7 |
HIP 75166 |
6.17 |
| 2026-05-26 12:00 |
15:21:34.42 |
+08:21:31.0 |
HIP 75166 |
5.54 |
| 2026-05-27 00:00 |
15:21:18.30 |
+08:21:18.2 |
HIP 75166 |
7.46 |
| 2026-05-27 12:00 |
15:21:02.26 |
+08:21:03.5 |
HIP 75166 |
10.61 |
| 2026-05-28 00:00 |
15:20:46.30 |
+08:20:46.8 |
HIP 75166 |
14.17 |
| 2026-05-28 12:00 |
15:20:30.42 |
+08:20:28.1 |
HIP 75166 |
17.90 |
| 2026-05-29 00:00 |
15:20:14.61 |
+08:20:07.4 |
HIP 75166 |
21.69 |
| 2026-05-29 12:00 |
15:19:58.89 |
+08:19:44.8 |
HIP 75166 |
25.52 |
| 2026-05-30 00:00 |
15:19:43.26 |
+08:19:20.1 |
HIP 75166 |
29.35 |
| 2026-05-30 12:00 |
15:19:27.72 |
+08:18:53.5 |
HIP 74903 |
30.45 |
| 2026-05-31 00:00 |
15:19:12.27 |
+08:18:25.0 |
HIP 74903 |
29.20 |
| 2026-05-31 12:00 |
15:18:56.92 |
+08:17:54.5 |
HIP 74903 |
28.46 |
| 2026-06-01 00:00 |
15:18:41.66 |
+08:17:22.0 |
HIP 74903 |
28.26 |
| 2026-06-01 12:00 |
15:18:26.50 |
+08:16:47.5 |
HIP 74903 |
28.60 |
| 2026-06-02 00:00 |
15:18:11.45 |
+08:16:11.1 |
HIP 74832 |
26.91 |