메타데이터
| 항목 |
값 |
| Designation |
391P/Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-02-19T06:43:26.376960Z |
| Orbit solution date (soln_date, UTC) |
2026-10-01T14:42:13Z |
| Obs used |
267 |
| 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) |
2009-06-22.0000000 |
| e |
0.11901242 |
| q (au) |
4.119776 |
| a (au) |
4.676315 |
| i (deg) |
21.274961 |
| Ω (om, deg) |
124.761950 |
| ω (w, deg) |
186.817232 |
| M (ma, deg) |
47.633044 |
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) |
| 2026-09-25 00:00 |
15:38:02.23 |
-02:11:42.9 |
HIP 76607 |
26.42 |
| 2026-09-25 12:00 |
15:38:26.12 |
-02:14:54.9 |
HIP 76738 |
27.38 |
| 2026-09-26 00:00 |
15:38:50.13 |
-02:18:06.4 |
HIP 76738 |
21.02 |
| 2026-09-26 12:00 |
15:39:14.24 |
-02:21:17.6 |
HIP 76738 |
15.02 |
| 2026-09-27 00:00 |
15:39:38.46 |
-02:24:28.4 |
HIP 76738 |
10.08 |
| 2026-09-27 12:00 |
15:40:02.80 |
-02:27:38.7 |
HIP 76738 |
8.42 |
| 2026-09-28 00:00 |
15:40:27.24 |
-02:30:48.7 |
HIP 76738 |
11.58 |
| 2026-09-28 12:00 |
15:40:51.79 |
-02:33:58.2 |
HIP 76842 |
9.18 |
| 2026-09-29 00:00 |
15:41:16.44 |
-02:37:07.4 |
HIP 76842 |
2.26 |
| 2026-09-29 12:00 |
15:41:41.21 |
-02:40:16.1 |
HIP 76842 |
4.68 |
| 2026-09-30 00:00 |
15:42:06.08 |
-02:43:24.3 |
HIP 76842 |
11.64 |
| 2026-09-30 12:00 |
15:42:31.05 |
-02:46:32.2 |
HIP 76842 |
18.61 |
| 2026-10-01 00:00 |
15:42:56.13 |
-02:49:39.6 |
HIP 77080 |
23.86 |
| 2026-10-01 12:00 |
15:43:21.32 |
-02:52:46.5 |
HIP 77080 |
16.85 |
| 2026-10-02 00:00 |
15:43:46.60 |
-02:55:53.0 |
HIP 77080 |
9.82 |
| 2026-10-02 12:00 |
15:44:12.00 |
-02:58:59.1 |
HIP 77080 |
2.81 |
| 2026-10-03 00:00 |
15:44:37.49 |
-03:02:04.7 |
HIP 77080 |
4.38 |
| 2026-10-03 12:00 |
15:45:03.09 |
-03:05:09.9 |
HIP 77080 |
11.45 |
| 2026-10-04 00:00 |
15:45:28.78 |
-03:08:14.6 |
HIP 77080 |
18.56 |
| 2026-10-04 12:00 |
15:45:54.58 |
-03:11:18.8 |
HIP 77080 |
25.69 |
| 2026-10-05 00:00 |
15:46:20.48 |
-03:14:22.5 |
HIP 77080 |
32.84 |
| 2026-10-05 12:00 |
15:46:46.48 |
-03:17:25.8 |
HIP 77429 |
31.39 |
| 2026-10-06 00:00 |
15:47:12.58 |
-03:20:28.5 |
HIP 77429 |
29.04 |
| 2026-10-06 12:00 |
15:47:38.77 |
-03:23:30.8 |
HIP 77429 |
28.34 |
| 2026-10-07 00:00 |
15:48:05.07 |
-03:26:32.6 |
HIP 77516 |
23.02 |
| 2026-10-07 12:00 |
15:48:31.46 |
-03:29:33.8 |
HIP 77516 |
16.85 |
| 2026-10-08 00:00 |
15:48:57.94 |
-03:32:34.6 |
HIP 77516 |
11.92 |
| 2026-10-08 12:00 |
15:49:24.53 |
-03:35:34.9 |
HIP 77516 |
10.28 |
| 2026-10-09 00:00 |
15:49:51.20 |
-03:38:34.6 |
HIP 77516 |
13.23 |
| 2026-10-09 12:00 |
15:50:17.97 |
-03:41:33.8 |
HIP 77542 |
14.60 |
| 2026-10-10 00:00 |
15:50:44.84 |
-03:44:32.5 |
HIP 77542 |
15.91 |
| 2026-10-10 12:00 |
15:51:11.80 |
-03:47:30.6 |
HIP 77542 |
20.03 |
| 2026-10-11 00:00 |
15:51:38.84 |
-03:50:28.2 |
HIP 77542 |
25.67 |
| 2026-10-11 12:00 |
15:52:05.98 |
-03:53:25.3 |
HIP 77542 |
32.04 |
| 2026-10-12 00:00 |
15:52:33.21 |
-03:56:21.8 |
HIP 77899 |
35.43 |
| 2026-10-12 12:00 |
15:53:00.53 |
-03:59:17.8 |
HIP 77899 |
28.22 |
| 2026-10-13 00:00 |
15:53:27.94 |
-04:02:13.2 |
HIP 77899 |
21.13 |
| 2026-10-13 12:00 |
15:53:55.44 |
-04:05:08.0 |
HIP 77899 |
14.40 |
| 2026-10-14 00:00 |
15:54:23.02 |
-04:08:02.2 |
HIP 77899 |
8.91 |
| 2026-10-14 12:00 |
15:54:50.69 |
-04:10:55.9 |
HIP 77899 |
7.95 |
| 2026-10-15 00:00 |
15:55:18.44 |
-04:13:49.0 |
HIP 77899 |
12.63 |
| 2026-10-15 12:00 |
15:55:46.28 |
-04:16:41.6 |
HIP 78089 |
13.93 |
| 2026-10-16 00:00 |
15:56:14.21 |
-04:19:33.5 |
HIP 78089 |
8.56 |