C/2015 A1 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
C/2015 A1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-03-13T01:22:02.553600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
32.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-29.0000000 |
| e |
0.90081449 |
| q (au) |
1.995505 |
| a (au) |
20.118914 |
| i (deg) |
80.365746 |
| Ω (om, deg) |
341.085968 |
| ω (w, deg) |
244.879299 |
| M (ma, deg) |
0.174128 |
밝기
산란 + 전체 선형
$$
M_a = (13.204 + 4.454\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.204 |
| n |
4.454 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
22:07:44.75 |
+30:50:41.9 |
HIP 109148 |
16.00 |
| 2026-02-03 12:00 |
22:07:50.24 |
+30:50:54.1 |
HIP 109148 |
17.06 |
| 2026-02-04 00:00 |
22:07:55.75 |
+30:51:06.8 |
HIP 109148 |
18.14 |
| 2026-02-04 12:00 |
22:08:01.27 |
+30:51:20.0 |
HIP 109148 |
19.24 |
| 2026-02-05 00:00 |
22:08:06.80 |
+30:51:33.6 |
HIP 109148 |
20.35 |
| 2026-02-05 12:00 |
22:08:12.34 |
+30:51:47.8 |
HIP 109148 |
21.47 |
| 2026-02-06 00:00 |
22:08:17.89 |
+30:52:02.4 |
HIP 109148 |
22.60 |
| 2026-02-06 12:00 |
22:08:23.45 |
+30:52:17.5 |
HIP 109148 |
23.73 |
| 2026-02-07 00:00 |
22:08:29.02 |
+30:52:33.1 |
HIP 109370 |
23.79 |
| 2026-02-07 12:00 |
22:08:34.60 |
+30:52:49.2 |
HIP 109370 |
23.42 |
| 2026-02-08 00:00 |
22:08:40.18 |
+30:53:05.7 |
HIP 109370 |
23.11 |
| 2026-02-08 12:00 |
22:08:45.78 |
+30:53:22.7 |
HIP 109454 |
22.64 |
| 2026-02-09 00:00 |
22:08:51.38 |
+30:53:40.2 |
HIP 109454 |
21.53 |
| 2026-02-09 12:00 |
22:08:56.99 |
+30:53:58.2 |
HIP 109454 |
20.43 |
| 2026-02-10 00:00 |
22:09:02.61 |
+30:54:16.6 |
HIP 109454 |
19.36 |
| 2026-02-10 12:00 |
22:09:08.23 |
+30:54:35.5 |
HIP 109454 |
18.31 |
| 2026-02-11 00:00 |
22:09:13.86 |
+30:54:54.9 |
HIP 109454 |
17.28 |
| 2026-02-11 12:00 |
22:09:19.50 |
+30:55:14.7 |
HIP 109454 |
16.29 |
| 2026-02-12 00:00 |
22:09:25.14 |
+30:55:35.1 |
HIP 109454 |
15.34 |
| 2026-02-12 12:00 |
22:09:30.79 |
+30:55:55.9 |
HIP 109454 |
14.45 |
| 2026-02-13 00:00 |
22:09:36.44 |
+30:56:17.1 |
HIP 109454 |
13.61 |
| 2026-02-13 12:00 |
22:09:42.10 |
+30:56:38.9 |
HIP 109454 |
12.84 |
| 2026-02-14 00:00 |
22:09:47.76 |
+30:57:01.0 |
HIP 109454 |
12.17 |
| 2026-02-14 12:00 |
22:09:53.42 |
+30:57:23.7 |
HIP 109454 |
11.60 |
| 2026-02-15 00:00 |
22:09:59.09 |
+30:57:46.8 |
HIP 109454 |
11.15 |
| 2026-02-15 12:00 |
22:10:04.76 |
+30:58:10.4 |
HIP 109454 |
10.85 |
| 2026-02-16 00:00 |
22:10:10.43 |
+30:58:34.4 |
HIP 109454 |
10.69 |
| 2026-02-16 12:00 |
22:10:16.10 |
+30:58:58.9 |
HIP 109454 |
10.70 |
| 2026-02-17 00:00 |
22:10:21.78 |
+30:59:23.9 |
HIP 109454 |
10.86 |
| 2026-02-17 12:00 |
22:10:27.46 |
+30:59:49.3 |
HIP 109454 |
11.18 |
| 2026-02-18 00:00 |
22:10:33.13 |
+31:00:15.1 |
HIP 109454 |
11.64 |
| 2026-02-18 12:00 |
22:10:38.81 |
+31:00:41.5 |
HIP 109454 |
12.23 |
| 2026-02-19 00:00 |
22:10:44.49 |
+31:01:08.2 |
HIP 109454 |
12.93 |
| 2026-02-19 12:00 |
22:10:50.17 |
+31:01:35.4 |
HIP 109454 |
13.73 |
| 2026-02-20 00:00 |
22:10:55.84 |
+31:02:03.1 |
HIP 109454 |
14.60 |
| 2026-02-20 12:00 |
22:11:01.52 |
+31:02:31.2 |
HIP 109454 |
15.54 |
| 2026-02-21 00:00 |
22:11:07.19 |
+31:02:59.7 |
HIP 109454 |
16.53 |
| 2026-02-21 12:00 |
22:11:12.86 |
+31:03:28.7 |
HIP 109454 |
17.57 |
| 2026-02-22 00:00 |
22:11:18.53 |
+31:03:58.1 |
HIP 109454 |
18.66 |
| 2026-02-22 12:00 |
22:11:24.19 |
+31:04:28.0 |
HIP 109454 |
19.77 |
| 2026-02-23 00:00 |
22:11:29.86 |
+31:04:58.2 |
HIP 109454 |
20.91 |
| 2026-02-23 12:00 |
22:11:35.51 |
+31:05:29.0 |
HIP 109454 |
22.08 |
| 2026-02-24 00:00 |
22:11:41.17 |
+31:06:00.1 |
HIP 109454 |
23.26 |