메타데이터
| 항목 |
값 |
| Designation |
C/2012 A1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-11-29T15:21:03.746880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:59Z |
| Obs used |
322 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
5.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-12-26.0000000 |
| e |
1.00119496 |
| q (au) |
7.604434 |
| a (au) |
-6363.768778 |
| i (deg) |
120.900017 |
| Ω (om, deg) |
277.972039 |
| ω (w, deg) |
191.758696 |
| M (ma, deg) |
-0.000657 |
밝기
산란 + 전체 선형
$$
M_a = (9.596 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.596 |
| n |
2.000 |
| gf |
0.822 |
| gb |
-0.955 |
| k |
1.000 |
| δ90 |
2.186 |
| 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) |
| 2026-05-12 00:00 |
22:54:28.86 |
-56:51:04.1 |
HIP 113351 |
23.70 |
| 2026-05-12 12:00 |
22:54:30.41 |
-56:51:46.7 |
HIP 113351 |
23.46 |
| 2026-05-13 00:00 |
22:54:31.89 |
-56:52:29.7 |
HIP 113351 |
23.24 |
| 2026-05-13 12:00 |
22:54:33.31 |
-56:53:12.9 |
HIP 113351 |
23.05 |
| 2026-05-14 00:00 |
22:54:34.66 |
-56:53:56.5 |
HIP 113351 |
22.90 |
| 2026-05-14 12:00 |
22:54:35.96 |
-56:54:40.4 |
HIP 113351 |
22.77 |
| 2026-05-15 00:00 |
22:54:37.19 |
-56:55:24.6 |
HIP 113351 |
22.69 |
| 2026-05-15 12:00 |
22:54:38.35 |
-56:56:09.1 |
HIP 113351 |
22.63 |
| 2026-05-16 00:00 |
22:54:39.45 |
-56:56:53.9 |
HIP 113351 |
22.61 |
| 2026-05-16 12:00 |
22:54:40.49 |
-56:57:38.9 |
HIP 113351 |
22.63 |
| 2026-05-17 00:00 |
22:54:41.46 |
-56:58:24.3 |
HIP 113351 |
22.68 |
| 2026-05-17 12:00 |
22:54:42.37 |
-56:59:10.0 |
HIP 113351 |
22.77 |
| 2026-05-18 00:00 |
22:54:43.21 |
-56:59:56.0 |
HIP 113351 |
22.89 |
| 2026-05-18 12:00 |
22:54:43.99 |
-57:00:42.2 |
HIP 113351 |
23.05 |
| 2026-05-19 00:00 |
22:54:44.70 |
-57:01:28.7 |
HIP 113351 |
23.24 |
| 2026-05-19 12:00 |
22:54:45.34 |
-57:02:15.5 |
HIP 113351 |
23.47 |
| 2026-05-20 00:00 |
22:54:45.92 |
-57:03:02.6 |
HIP 113351 |
23.74 |
| 2026-05-20 12:00 |
22:54:46.43 |
-57:03:49.9 |
HIP 113351 |
24.03 |
| 2026-05-21 00:00 |
22:54:46.88 |
-57:04:37.5 |
HIP 113351 |
24.36 |
| 2026-05-21 12:00 |
22:54:47.26 |
-57:05:25.4 |
HIP 113351 |
24.72 |
| 2026-05-22 00:00 |
22:54:47.57 |
-57:06:13.5 |
HIP 113351 |
25.11 |
| 2026-05-22 12:00 |
22:54:47.82 |
-57:07:01.9 |
HIP 113330 |
25.26 |
| 2026-05-23 00:00 |
22:54:47.99 |
-57:07:50.5 |
HIP 113330 |
24.70 |
| 2026-05-23 12:00 |
22:54:48.10 |
-57:08:39.4 |
HIP 113330 |
24.16 |
| 2026-05-24 00:00 |
22:54:48.15 |
-57:09:28.5 |
HIP 113330 |
23.64 |
| 2026-05-24 12:00 |
22:54:48.12 |
-57:10:17.8 |
HIP 113330 |
23.14 |
| 2026-05-25 00:00 |
22:54:48.03 |
-57:11:07.4 |
HIP 113330 |
22.66 |
| 2026-05-25 12:00 |
22:54:47.87 |
-57:11:57.2 |
HIP 113330 |
22.22 |
| 2026-05-26 00:00 |
22:54:47.64 |
-57:12:47.2 |
HIP 113330 |
21.80 |
| 2026-05-26 12:00 |
22:54:47.35 |
-57:13:37.5 |
HIP 113330 |
21.41 |
| 2026-05-27 00:00 |
22:54:46.98 |
-57:14:28.0 |
HIP 113330 |
21.05 |
| 2026-05-27 12:00 |
22:54:46.55 |
-57:15:18.6 |
HIP 113330 |
20.73 |
| 2026-05-28 00:00 |
22:54:46.04 |
-57:16:09.5 |
HIP 113330 |
20.44 |
| 2026-05-28 12:00 |
22:54:45.47 |
-57:17:00.7 |
HIP 113330 |
20.20 |
| 2026-05-29 00:00 |
22:54:44.83 |
-57:17:52.0 |
HIP 113330 |
20.00 |
| 2026-05-29 12:00 |
22:54:44.13 |
-57:18:43.5 |
HIP 113330 |
19.83 |
| 2026-05-30 00:00 |
22:54:43.35 |
-57:19:35.2 |
HIP 113330 |
19.72 |
| 2026-05-30 12:00 |
22:54:42.50 |
-57:20:27.1 |
HIP 113330 |
19.65 |
| 2026-05-31 00:00 |
22:54:41.58 |
-57:21:19.2 |
HIP 113330 |
19.63 |
| 2026-05-31 12:00 |
22:54:40.60 |
-57:22:11.4 |
HIP 113330 |
19.65 |
| 2026-06-01 00:00 |
22:54:39.54 |
-57:23:03.9 |
HIP 113330 |
19.73 |
| 2026-06-01 12:00 |
22:54:38.41 |
-57:23:56.5 |
HIP 113330 |
19.85 |
| 2026-06-02 00:00 |
22:54:37.22 |
-57:24:49.3 |
HIP 113330 |
20.02 |