C/2015 D2 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
C/2015 D2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-09-27T14:47:50.671680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:07Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-24.0000000 |
| e |
0.56825603 |
| q (au) |
5.606049 |
| a (au) |
12.984662 |
| i (deg) |
31.834348 |
| Ω (om, deg) |
162.858947 |
| ω (w, deg) |
291.923116 |
| M (ma, deg) |
11.425219 |
밝기
산란 + 전체 선형
$$
M_a = (6.637 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.637 |
| n |
6.000 |
| gf |
0.948 |
| gb |
-0.640 |
| k |
0.800 |
| δ90 |
8.992 |
| 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) |
| 2026-02-03 00:00 |
16:35:26.27 |
+09:12:04.5 |
HIP 81350 |
21.07 |
| 2026-02-03 12:00 |
16:35:30.65 |
+09:12:45.7 |
HIP 81350 |
20.16 |
| 2026-02-04 00:00 |
16:35:34.98 |
+09:13:27.2 |
HIP 81350 |
19.31 |
| 2026-02-04 12:00 |
16:35:39.26 |
+09:14:09.1 |
HIP 81350 |
18.51 |
| 2026-02-05 00:00 |
16:35:43.48 |
+09:14:51.3 |
HIP 81350 |
17.79 |
| 2026-02-05 12:00 |
16:35:47.65 |
+09:15:33.8 |
HIP 81350 |
17.15 |
| 2026-02-06 00:00 |
16:35:51.77 |
+09:16:16.7 |
HIP 81350 |
16.59 |
| 2026-02-06 12:00 |
16:35:55.84 |
+09:17:00.0 |
HIP 81350 |
16.11 |
| 2026-02-07 00:00 |
16:35:59.85 |
+09:17:43.4 |
HIP 81350 |
15.74 |
| 2026-02-07 12:00 |
16:36:03.82 |
+09:18:27.3 |
HIP 81350 |
15.47 |
| 2026-02-08 00:00 |
16:36:07.72 |
+09:19:11.4 |
HIP 81350 |
15.30 |
| 2026-02-08 12:00 |
16:36:11.58 |
+09:19:55.9 |
HIP 81350 |
15.24 |
| 2026-02-09 00:00 |
16:36:15.38 |
+09:20:40.6 |
HIP 81350 |
15.29 |
| 2026-02-09 12:00 |
16:36:19.12 |
+09:21:25.7 |
HIP 81350 |
15.44 |
| 2026-02-10 00:00 |
16:36:22.81 |
+09:22:11.1 |
HIP 81350 |
15.69 |
| 2026-02-10 12:00 |
16:36:26.44 |
+09:22:56.8 |
HIP 81350 |
16.04 |
| 2026-02-11 00:00 |
16:36:30.02 |
+09:23:42.8 |
HIP 81350 |
16.47 |
| 2026-02-11 12:00 |
16:36:33.55 |
+09:24:29.0 |
HIP 81350 |
16.97 |
| 2026-02-12 00:00 |
16:36:37.02 |
+09:25:15.6 |
HIP 81350 |
17.55 |
| 2026-02-12 12:00 |
16:36:40.43 |
+09:26:02.5 |
HIP 81350 |
18.19 |
| 2026-02-13 00:00 |
16:36:43.79 |
+09:26:49.6 |
HIP 81430 |
17.90 |
| 2026-02-13 12:00 |
16:36:47.08 |
+09:27:37.0 |
HIP 81430 |
17.01 |
| 2026-02-14 00:00 |
16:36:50.33 |
+09:28:24.7 |
HIP 81430 |
16.16 |
| 2026-02-14 12:00 |
16:36:53.51 |
+09:29:12.7 |
HIP 81430 |
15.37 |
| 2026-02-15 00:00 |
16:36:56.64 |
+09:30:01.0 |
HIP 81430 |
14.63 |
| 2026-02-15 12:00 |
16:36:59.71 |
+09:30:49.5 |
HIP 81430 |
13.95 |
| 2026-02-16 00:00 |
16:37:02.73 |
+09:31:38.3 |
HIP 81430 |
13.35 |
| 2026-02-16 12:00 |
16:37:05.68 |
+09:32:27.3 |
HIP 81430 |
12.83 |
| 2026-02-17 00:00 |
16:37:08.58 |
+09:33:16.6 |
HIP 81430 |
12.40 |
| 2026-02-17 12:00 |
16:37:11.42 |
+09:34:06.2 |
HIP 81430 |
12.07 |
| 2026-02-18 00:00 |
16:37:14.20 |
+09:34:56.0 |
HIP 81430 |
11.84 |
| 2026-02-18 12:00 |
16:37:16.93 |
+09:35:46.1 |
HIP 81430 |
11.72 |
| 2026-02-19 00:00 |
16:37:19.59 |
+09:36:36.4 |
HIP 81430 |
11.71 |
| 2026-02-19 12:00 |
16:37:22.20 |
+09:37:26.9 |
HIP 81430 |
11.82 |
| 2026-02-20 00:00 |
16:37:24.74 |
+09:38:17.7 |
HIP 81430 |
12.02 |
| 2026-02-20 12:00 |
16:37:27.23 |
+09:39:08.7 |
HIP 81430 |
12.33 |
| 2026-02-21 00:00 |
16:37:29.66 |
+09:40:00.0 |
HIP 81430 |
12.72 |
| 2026-02-21 12:00 |
16:37:32.03 |
+09:40:51.4 |
HIP 81430 |
13.20 |
| 2026-02-22 00:00 |
16:37:34.33 |
+09:41:43.0 |
HIP 81430 |
13.75 |
| 2026-02-22 12:00 |
16:37:36.58 |
+09:42:34.9 |
HIP 81430 |
14.36 |
| 2026-02-23 00:00 |
16:37:38.77 |
+09:43:27.0 |
HIP 81430 |
15.02 |
| 2026-02-23 12:00 |
16:37:40.90 |
+09:44:19.3 |
HIP 81430 |
15.73 |
| 2026-02-24 00:00 |
16:37:42.97 |
+09:45:11.8 |
HIP 81430 |
16.47 |