메타데이터
| 항목 |
값 |
| Designation |
C/2015 D5 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-04-17T01:46:07.006080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:07Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-06.0000000 |
| e |
0.49964849 |
| q (au) |
4.577343 |
| a (au) |
9.148254 |
| i (deg) |
20.399803 |
| Ω (om, deg) |
74.578267 |
| ω (w, deg) |
40.175332 |
| M (ma, deg) |
11.502709 |
밝기
산란 + 전체 선형
$$
M_a = (12.465 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.465 |
| n |
2.000 |
| gf |
0.872 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.948 |
| 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) |
| 2026-03-26 00:00 |
19:28:25.72 |
-32:36:18.3 |
HIP 95804 |
11.65 |
| 2026-03-26 12:00 |
19:28:30.62 |
-32:36:40.3 |
HIP 95804 |
10.59 |
| 2026-03-27 00:00 |
19:28:35.43 |
-32:37:02.5 |
HIP 95804 |
9.54 |
| 2026-03-27 12:00 |
19:28:40.17 |
-32:37:24.9 |
HIP 95804 |
8.51 |
| 2026-03-28 00:00 |
19:28:44.82 |
-32:37:47.6 |
HIP 95804 |
7.50 |
| 2026-03-28 12:00 |
19:28:49.39 |
-32:38:10.5 |
HIP 95804 |
6.51 |
| 2026-03-29 00:00 |
19:28:53.88 |
-32:38:33.6 |
HIP 95804 |
5.55 |
| 2026-03-29 12:00 |
19:28:58.30 |
-32:38:56.9 |
HIP 95804 |
4.63 |
| 2026-03-30 00:00 |
19:29:02.62 |
-32:39:20.5 |
HIP 95804 |
3.75 |
| 2026-03-30 12:00 |
19:29:06.87 |
-32:39:44.3 |
HIP 95804 |
2.95 |
| 2026-03-31 00:00 |
19:29:11.04 |
-32:40:08.3 |
HIP 95804 |
2.30 |
| 2026-03-31 12:00 |
19:29:15.12 |
-32:40:32.6 |
HIP 95804 |
1.92 |
| 2026-04-01 00:00 |
19:29:19.12 |
-32:40:57.0 |
HIP 95804 |
1.95 |
| 2026-04-01 12:00 |
19:29:23.04 |
-32:41:21.7 |
HIP 95804 |
2.37 |
| 2026-04-02 00:00 |
19:29:26.88 |
-32:41:46.7 |
HIP 95804 |
3.00 |
| 2026-04-02 12:00 |
19:29:30.63 |
-32:42:11.8 |
HIP 95804 |
3.73 |
| 2026-04-03 00:00 |
19:29:34.30 |
-32:42:37.2 |
HIP 95804 |
4.51 |
| 2026-04-03 12:00 |
19:29:37.89 |
-32:43:02.8 |
HIP 95804 |
5.29 |
| 2026-04-04 00:00 |
19:29:41.39 |
-32:43:28.6 |
HIP 95804 |
6.09 |
| 2026-04-04 12:00 |
19:29:44.81 |
-32:43:54.6 |
HIP 95804 |
6.88 |
| 2026-04-05 00:00 |
19:29:48.14 |
-32:44:20.9 |
HIP 95804 |
7.66 |
| 2026-04-05 12:00 |
19:29:51.39 |
-32:44:47.3 |
HIP 95804 |
8.44 |
| 2026-04-06 00:00 |
19:29:54.55 |
-32:45:14.0 |
HIP 95804 |
9.20 |
| 2026-04-06 12:00 |
19:29:57.63 |
-32:45:40.9 |
HIP 95804 |
9.96 |
| 2026-04-07 00:00 |
19:30:00.63 |
-32:46:08.0 |
HIP 95804 |
10.71 |
| 2026-04-07 12:00 |
19:30:03.54 |
-32:46:35.4 |
HIP 95804 |
11.44 |
| 2026-04-08 00:00 |
19:30:06.36 |
-32:47:02.9 |
HIP 95804 |
12.16 |
| 2026-04-08 12:00 |
19:30:09.10 |
-32:47:30.7 |
HIP 95804 |
12.87 |
| 2026-04-09 00:00 |
19:30:11.75 |
-32:47:58.7 |
HIP 95804 |
13.57 |
| 2026-04-09 12:00 |
19:30:14.31 |
-32:48:26.9 |
HIP 95804 |
14.25 |
| 2026-04-10 00:00 |
19:30:16.79 |
-32:48:55.2 |
HIP 95804 |
14.93 |
| 2026-04-10 12:00 |
19:30:19.18 |
-32:49:23.9 |
HIP 95804 |
15.59 |
| 2026-04-11 00:00 |
19:30:21.48 |
-32:49:52.7 |
HIP 95804 |
16.24 |
| 2026-04-11 12:00 |
19:30:23.70 |
-32:50:21.7 |
HIP 95804 |
16.87 |
| 2026-04-12 00:00 |
19:30:25.83 |
-32:50:50.9 |
HIP 95804 |
17.50 |
| 2026-04-12 12:00 |
19:30:27.87 |
-32:51:20.4 |
HIP 95804 |
18.11 |
| 2026-04-13 00:00 |
19:30:29.82 |
-32:51:50.0 |
HIP 95804 |
18.71 |
| 2026-04-13 12:00 |
19:30:31.69 |
-32:52:19.8 |
HIP 95804 |
19.30 |
| 2026-04-14 00:00 |
19:30:33.47 |
-32:52:49.9 |
HIP 95804 |
19.88 |
| 2026-04-14 12:00 |
19:30:35.15 |
-32:53:20.1 |
HIP 95804 |
20.45 |
| 2026-04-15 00:00 |
19:30:36.75 |
-32:53:50.6 |
HIP 95804 |
21.01 |
| 2026-04-15 12:00 |
19:30:38.27 |
-32:54:21.2 |
HIP 96088 |
20.69 |
| 2026-04-16 00:00 |
19:30:39.69 |
-32:54:52.0 |
HIP 96088 |
20.22 |