메타데이터
| 항목 |
값 |
| Designation |
C/1969 P1 (Fujikawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1969-10-12T10:44:43.465920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
69 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
8.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1969-09-15.0000000 |
| e |
1.00000000 |
| q (au) |
0.773919 |
| a (au) |
- |
| i (deg) |
8.925201 |
| Ω (om, deg) |
192.395306 |
| ω (w, deg) |
299.019745 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (7.334 + 4.191\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.334 |
| n |
4.191 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-05-12 00:00 |
20:06:01.26 |
-11:34:58.0 |
HIP 98910 |
13.71 |
| 2026-05-12 12:00 |
20:06:00.76 |
-11:34:56.5 |
HIP 98910 |
13.59 |
| 2026-05-13 00:00 |
20:06:00.25 |
-11:34:55.0 |
HIP 98910 |
13.47 |
| 2026-05-13 12:00 |
20:05:59.73 |
-11:34:53.6 |
HIP 98910 |
13.34 |
| 2026-05-14 00:00 |
20:05:59.19 |
-11:34:52.2 |
HIP 98910 |
13.22 |
| 2026-05-14 12:00 |
20:05:58.65 |
-11:34:50.9 |
HIP 98910 |
13.08 |
| 2026-05-15 00:00 |
20:05:58.09 |
-11:34:49.6 |
HIP 98910 |
12.95 |
| 2026-05-15 12:00 |
20:05:57.52 |
-11:34:48.4 |
HIP 98910 |
12.81 |
| 2026-05-16 00:00 |
20:05:56.94 |
-11:34:47.2 |
HIP 98910 |
12.67 |
| 2026-05-16 12:00 |
20:05:56.35 |
-11:34:46.1 |
HIP 98910 |
12.53 |
| 2026-05-17 00:00 |
20:05:55.74 |
-11:34:45.0 |
HIP 98910 |
12.39 |
| 2026-05-17 12:00 |
20:05:55.13 |
-11:34:43.9 |
HIP 98910 |
12.24 |
| 2026-05-18 00:00 |
20:05:54.51 |
-11:34:42.9 |
HIP 98910 |
12.09 |
| 2026-05-18 12:00 |
20:05:53.87 |
-11:34:42.0 |
HIP 98910 |
11.93 |
| 2026-05-19 00:00 |
20:05:53.22 |
-11:34:41.1 |
HIP 98910 |
11.78 |
| 2026-05-19 12:00 |
20:05:52.56 |
-11:34:40.2 |
HIP 98910 |
11.62 |
| 2026-05-20 00:00 |
20:05:51.89 |
-11:34:39.4 |
HIP 98910 |
11.46 |
| 2026-05-20 12:00 |
20:05:51.21 |
-11:34:38.6 |
HIP 98910 |
11.29 |
| 2026-05-21 00:00 |
20:05:50.52 |
-11:34:37.9 |
HIP 98910 |
11.13 |
| 2026-05-21 12:00 |
20:05:49.82 |
-11:34:37.2 |
HIP 98910 |
10.96 |
| 2026-05-22 00:00 |
20:05:49.11 |
-11:34:36.6 |
HIP 98910 |
10.79 |
| 2026-05-22 12:00 |
20:05:48.39 |
-11:34:36.0 |
HIP 98910 |
10.61 |
| 2026-05-23 00:00 |
20:05:47.65 |
-11:34:35.5 |
HIP 98910 |
10.43 |
| 2026-05-23 12:00 |
20:05:46.91 |
-11:34:35.0 |
HIP 98910 |
10.26 |
| 2026-05-24 00:00 |
20:05:46.16 |
-11:34:34.6 |
HIP 98910 |
10.07 |
| 2026-05-24 12:00 |
20:05:45.39 |
-11:34:34.2 |
HIP 98910 |
9.89 |
| 2026-05-25 00:00 |
20:05:44.62 |
-11:34:33.8 |
HIP 98910 |
9.70 |
| 2026-05-25 12:00 |
20:05:43.83 |
-11:34:33.5 |
HIP 98910 |
9.51 |
| 2026-05-26 00:00 |
20:05:43.04 |
-11:34:33.3 |
HIP 98910 |
9.32 |
| 2026-05-26 12:00 |
20:05:42.23 |
-11:34:33.1 |
HIP 98910 |
9.13 |
| 2026-05-27 00:00 |
20:05:41.41 |
-11:34:32.9 |
HIP 98910 |
8.93 |
| 2026-05-27 12:00 |
20:05:40.59 |
-11:34:32.8 |
HIP 98910 |
8.73 |
| 2026-05-28 00:00 |
20:05:39.75 |
-11:34:32.7 |
HIP 98910 |
8.53 |
| 2026-05-28 12:00 |
20:05:38.91 |
-11:34:32.7 |
HIP 98910 |
8.32 |
| 2026-05-29 00:00 |
20:05:38.05 |
-11:34:32.7 |
HIP 98910 |
8.12 |
| 2026-05-29 12:00 |
20:05:37.19 |
-11:34:32.8 |
HIP 98910 |
7.91 |
| 2026-05-30 00:00 |
20:05:36.32 |
-11:34:32.9 |
HIP 98910 |
7.70 |
| 2026-05-30 12:00 |
20:05:35.43 |
-11:34:33.1 |
HIP 98910 |
7.49 |
| 2026-05-31 00:00 |
20:05:34.54 |
-11:34:33.3 |
HIP 98910 |
7.27 |
| 2026-05-31 12:00 |
20:05:33.64 |
-11:34:33.6 |
HIP 98910 |
7.05 |
| 2026-06-01 00:00 |
20:05:32.72 |
-11:34:33.9 |
HIP 98910 |
6.83 |
| 2026-06-01 12:00 |
20:05:31.80 |
-11:34:34.2 |
HIP 98910 |
6.61 |
| 2026-06-02 00:00 |
20:05:30.87 |
-11:34:34.6 |
HIP 98910 |
6.39 |