메타데이터
| 항목 |
값 |
| Designation |
C/2011 S2 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-10-26T08:20:46.965120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:56Z |
| Obs used |
343 |
| NEO |
Yes |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-10-23.0000000 |
| e |
0.93161485 |
| q (au) |
1.115120 |
| a (au) |
16.306469 |
| i (deg) |
17.572538 |
| Ω (om, deg) |
288.070325 |
| ω (w, deg) |
192.189985 |
| M (ma, deg) |
359.949891 |
밝기
산란 + 전체 선형
$$
M_a = (15.975 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.975 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.701 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
19:27:44.44 |
-21:39:41.0 |
HIP 95564 |
20.99 |
| 2026-06-01 12:00 |
19:27:40.77 |
-21:39:47.1 |
HIP 95564 |
20.15 |
| 2026-06-02 00:00 |
19:27:37.07 |
-21:39:53.3 |
HIP 95564 |
19.31 |
| 2026-06-02 12:00 |
19:27:33.35 |
-21:39:59.6 |
HIP 95564 |
18.46 |
| 2026-06-03 00:00 |
19:27:29.59 |
-21:40:05.9 |
HIP 95564 |
17.61 |
| 2026-06-03 12:00 |
19:27:25.81 |
-21:40:12.3 |
HIP 95564 |
16.75 |
| 2026-06-04 00:00 |
19:27:21.99 |
-21:40:18.7 |
HIP 95564 |
15.90 |
| 2026-06-04 12:00 |
19:27:18.15 |
-21:40:25.2 |
HIP 95564 |
15.04 |
| 2026-06-05 00:00 |
19:27:14.29 |
-21:40:31.7 |
HIP 95564 |
14.18 |
| 2026-06-05 12:00 |
19:27:10.39 |
-21:40:38.3 |
HIP 95564 |
13.31 |
| 2026-06-06 00:00 |
19:27:06.47 |
-21:40:44.9 |
HIP 95564 |
12.45 |
| 2026-06-06 12:00 |
19:27:02.52 |
-21:40:51.6 |
HIP 95564 |
11.60 |
| 2026-06-07 00:00 |
19:26:58.54 |
-21:40:58.4 |
HIP 95564 |
10.74 |
| 2026-06-07 12:00 |
19:26:54.54 |
-21:41:05.2 |
HIP 95564 |
9.90 |
| 2026-06-08 00:00 |
19:26:50.52 |
-21:41:12.0 |
HIP 95564 |
9.07 |
| 2026-06-08 12:00 |
19:26:46.46 |
-21:41:18.9 |
HIP 95564 |
8.26 |
| 2026-06-09 00:00 |
19:26:42.39 |
-21:41:25.8 |
HIP 95564 |
7.48 |
| 2026-06-09 12:00 |
19:26:38.28 |
-21:41:32.8 |
HIP 95564 |
6.73 |
| 2026-06-10 00:00 |
19:26:34.16 |
-21:41:39.8 |
HIP 95564 |
6.05 |
| 2026-06-10 12:00 |
19:26:30.00 |
-21:41:46.9 |
HIP 95564 |
5.44 |
| 2026-06-11 00:00 |
19:26:25.83 |
-21:41:54.0 |
HIP 95564 |
4.95 |
| 2026-06-11 12:00 |
19:26:21.63 |
-21:42:01.2 |
HIP 95564 |
4.62 |
| 2026-06-12 00:00 |
19:26:17.41 |
-21:42:08.4 |
HIP 95564 |
4.48 |
| 2026-06-12 12:00 |
19:26:13.16 |
-21:42:15.6 |
HIP 95564 |
4.56 |
| 2026-06-13 00:00 |
19:26:08.90 |
-21:42:22.9 |
HIP 95564 |
4.84 |
| 2026-06-13 12:00 |
19:26:04.61 |
-21:42:30.2 |
HIP 95564 |
5.31 |
| 2026-06-14 00:00 |
19:26:00.29 |
-21:42:37.6 |
HIP 95564 |
5.91 |
| 2026-06-14 12:00 |
19:25:55.96 |
-21:42:45.0 |
HIP 95564 |
6.62 |
| 2026-06-15 00:00 |
19:25:51.61 |
-21:42:52.5 |
HIP 95564 |
7.40 |
| 2026-06-15 12:00 |
19:25:47.23 |
-21:43:00.0 |
HIP 95564 |
8.24 |
| 2026-06-16 00:00 |
19:25:42.84 |
-21:43:07.5 |
HIP 95564 |
9.12 |
| 2026-06-16 12:00 |
19:25:38.42 |
-21:43:15.0 |
HIP 95564 |
10.03 |
| 2026-06-17 00:00 |
19:25:33.99 |
-21:43:22.6 |
HIP 95564 |
10.97 |
| 2026-06-17 12:00 |
19:25:29.53 |
-21:43:30.2 |
HIP 95564 |
11.93 |
| 2026-06-18 00:00 |
19:25:25.06 |
-21:43:37.9 |
HIP 95564 |
12.90 |
| 2026-06-18 12:00 |
19:25:20.57 |
-21:43:45.6 |
HIP 95564 |
13.89 |
| 2026-06-19 00:00 |
19:25:16.06 |
-21:43:53.3 |
HIP 95564 |
14.89 |
| 2026-06-19 12:00 |
19:25:11.54 |
-21:44:01.1 |
HIP 95564 |
15.91 |
| 2026-06-20 00:00 |
19:25:07.00 |
-21:44:08.8 |
HIP 95564 |
16.93 |
| 2026-06-20 12:00 |
19:25:02.44 |
-21:44:16.7 |
HIP 95564 |
17.96 |
| 2026-06-21 00:00 |
19:24:57.86 |
-21:44:24.5 |
HIP 95564 |
19.00 |
| 2026-06-21 12:00 |
19:24:53.27 |
-21:44:32.4 |
HIP 95417 |
19.62 |
| 2026-06-22 00:00 |
19:24:48.66 |
-21:44:40.2 |
HIP 95417 |
19.28 |