메타데이터
| 항목 |
값 |
| Designation |
C/2015 P3 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-07-27T19:07:02.274240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
132 |
| NEO |
- |
| M1 |
16.300 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-08-17.0000000 |
| e |
0.99710074 |
| q (au) |
0.715220 |
| a (au) |
246.691015 |
| i (deg) |
58.183707 |
| Ω (om, deg) |
88.145306 |
| ω (w, deg) |
132.872099 |
| M (ma, deg) |
0.005139 |
밝기
산란 + 전체 선형
$$
M_a = (16.714 + 5.525\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.714 |
| n |
5.525 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
03:37:41.34 |
-31:39:16.8 |
HIP 16958 |
22.16 |
| 2026-06-01 12:00 |
03:37:46.25 |
-31:39:17.2 |
HIP 16958 |
21.90 |
| 2026-06-02 00:00 |
03:37:51.15 |
-31:39:18.0 |
HIP 16958 |
21.69 |
| 2026-06-02 12:00 |
03:37:56.03 |
-31:39:19.2 |
HIP 16958 |
21.55 |
| 2026-06-03 00:00 |
03:38:00.91 |
-31:39:20.8 |
HIP 16958 |
21.46 |
| 2026-06-03 12:00 |
03:38:05.77 |
-31:39:22.9 |
HIP 16958 |
21.42 |
| 2026-06-04 00:00 |
03:38:10.63 |
-31:39:25.4 |
HIP 16958 |
21.45 |
| 2026-06-04 12:00 |
03:38:15.47 |
-31:39:28.3 |
HIP 16958 |
21.53 |
| 2026-06-05 00:00 |
03:38:20.30 |
-31:39:31.6 |
HIP 16958 |
21.66 |
| 2026-06-05 12:00 |
03:38:25.12 |
-31:39:35.3 |
HIP 16958 |
21.85 |
| 2026-06-06 00:00 |
03:38:29.93 |
-31:39:39.5 |
HIP 16958 |
22.10 |
| 2026-06-06 12:00 |
03:38:34.73 |
-31:39:44.1 |
HIP 16958 |
22.39 |
| 2026-06-07 00:00 |
03:38:39.51 |
-31:39:49.0 |
HIP 16958 |
22.73 |
| 2026-06-07 12:00 |
03:38:44.28 |
-31:39:54.5 |
HIP 16958 |
23.12 |
| 2026-06-08 00:00 |
03:38:49.04 |
-31:40:00.3 |
HIP 16958 |
23.55 |
| 2026-06-08 12:00 |
03:38:53.78 |
-31:40:06.5 |
HIP 16958 |
24.03 |
| 2026-06-09 00:00 |
03:38:58.51 |
-31:40:13.2 |
HIP 16958 |
24.54 |
| 2026-06-09 12:00 |
03:39:03.23 |
-31:40:20.2 |
HIP 16958 |
25.08 |
| 2026-06-10 00:00 |
03:39:07.93 |
-31:40:27.7 |
HIP 16958 |
25.66 |
| 2026-06-10 12:00 |
03:39:12.62 |
-31:40:35.6 |
HIP 17194 |
24.84 |
| 2026-06-11 00:00 |
03:39:17.29 |
-31:40:43.9 |
HIP 17194 |
23.90 |
| 2026-06-11 12:00 |
03:39:21.94 |
-31:40:52.7 |
HIP 17194 |
22.97 |
| 2026-06-12 00:00 |
03:39:26.59 |
-31:41:01.8 |
HIP 17194 |
22.04 |
| 2026-06-12 12:00 |
03:39:31.21 |
-31:41:11.4 |
HIP 17194 |
21.11 |
| 2026-06-13 00:00 |
03:39:35.82 |
-31:41:21.4 |
HIP 17194 |
20.19 |
| 2026-06-13 12:00 |
03:39:40.41 |
-31:41:31.8 |
HIP 17194 |
19.28 |
| 2026-06-14 00:00 |
03:39:44.99 |
-31:41:42.6 |
HIP 17194 |
18.38 |
| 2026-06-14 12:00 |
03:39:49.55 |
-31:41:53.8 |
HIP 17194 |
17.48 |
| 2026-06-15 00:00 |
03:39:54.09 |
-31:42:05.4 |
HIP 17194 |
16.59 |
| 2026-06-15 12:00 |
03:39:58.61 |
-31:42:17.4 |
HIP 17194 |
15.71 |
| 2026-06-16 00:00 |
03:40:03.12 |
-31:42:29.9 |
HIP 17194 |
14.85 |
| 2026-06-16 12:00 |
03:40:07.60 |
-31:42:42.8 |
HIP 17194 |
14.00 |
| 2026-06-17 00:00 |
03:40:12.07 |
-31:42:56.0 |
HIP 17194 |
13.16 |
| 2026-06-17 12:00 |
03:40:16.52 |
-31:43:09.7 |
HIP 17194 |
12.34 |
| 2026-06-18 00:00 |
03:40:20.95 |
-31:43:23.8 |
HIP 17194 |
11.54 |
| 2026-06-18 12:00 |
03:40:25.36 |
-31:43:38.2 |
HIP 17194 |
10.77 |
| 2026-06-19 00:00 |
03:40:29.75 |
-31:43:53.1 |
HIP 17194 |
10.02 |
| 2026-06-19 12:00 |
03:40:34.12 |
-31:44:08.4 |
HIP 17194 |
9.32 |
| 2026-06-20 00:00 |
03:40:38.47 |
-31:44:24.1 |
HIP 17194 |
8.66 |
| 2026-06-20 12:00 |
03:40:42.80 |
-31:44:40.2 |
HIP 17194 |
8.06 |
| 2026-06-21 00:00 |
03:40:47.11 |
-31:44:56.6 |
HIP 17194 |
7.52 |
| 2026-06-21 12:00 |
03:40:51.39 |
-31:45:13.5 |
HIP 17194 |
7.07 |
| 2026-06-22 00:00 |
03:40:55.66 |
-31:45:30.8 |
HIP 17194 |
6.72 |