메타데이터
| 항목 |
값 |
| Designation |
C/1994 J2 (Takamizawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-06-29T14:44:36.781440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
399 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1994-12-15.0000000 |
| e |
0.99623127 |
| q (au) |
1.947740 |
| a (au) |
516.815888 |
| i (deg) |
135.961791 |
| Ω (om, deg) |
51.129192 |
| ω (w, deg) |
192.116161 |
| M (ma, deg) |
0.014126 |
밝기
산란 + 전체 선형
$$
M_a = (8.389 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.389 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.972 |
| δ90 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
03:44:45.17 |
+13:19:20.2 |
HIP 17557 |
13.16 |
| 2026-03-26 12:00 |
03:44:46.39 |
+13:19:28.1 |
HIP 17557 |
12.93 |
| 2026-03-27 00:00 |
03:44:47.62 |
+13:19:35.9 |
HIP 17557 |
12.70 |
| 2026-03-27 12:00 |
03:44:48.86 |
+13:19:43.8 |
HIP 17557 |
12.47 |
| 2026-03-28 00:00 |
03:44:50.12 |
+13:19:51.7 |
HIP 17557 |
12.24 |
| 2026-03-28 12:00 |
03:44:51.40 |
+13:19:59.7 |
HIP 17557 |
12.01 |
| 2026-03-29 00:00 |
03:44:52.69 |
+13:20:07.6 |
HIP 17557 |
11.79 |
| 2026-03-29 12:00 |
03:44:53.99 |
+13:20:15.6 |
HIP 17557 |
11.57 |
| 2026-03-30 00:00 |
03:44:55.31 |
+13:20:23.6 |
HIP 17557 |
11.35 |
| 2026-03-30 12:00 |
03:44:56.64 |
+13:20:31.7 |
HIP 17557 |
11.14 |
| 2026-03-31 00:00 |
03:44:57.98 |
+13:20:39.7 |
HIP 17557 |
10.93 |
| 2026-03-31 12:00 |
03:44:59.34 |
+13:20:47.8 |
HIP 17557 |
10.72 |
| 2026-04-01 00:00 |
03:45:00.71 |
+13:20:55.9 |
HIP 17557 |
10.53 |
| 2026-04-01 12:00 |
03:45:02.09 |
+13:21:04.0 |
HIP 17557 |
10.33 |
| 2026-04-02 00:00 |
03:45:03.49 |
+13:21:12.2 |
HIP 17557 |
10.15 |
| 2026-04-02 12:00 |
03:45:04.90 |
+13:21:20.3 |
HIP 17557 |
9.97 |
| 2026-04-03 00:00 |
03:45:06.33 |
+13:21:28.5 |
HIP 17557 |
9.80 |
| 2026-04-03 12:00 |
03:45:07.76 |
+13:21:36.7 |
HIP 17557 |
9.64 |
| 2026-04-04 00:00 |
03:45:09.21 |
+13:21:44.9 |
HIP 17557 |
9.49 |
| 2026-04-04 12:00 |
03:45:10.68 |
+13:21:53.2 |
HIP 17557 |
9.36 |
| 2026-04-05 00:00 |
03:45:12.15 |
+13:22:01.4 |
HIP 17557 |
9.23 |
| 2026-04-05 12:00 |
03:45:13.64 |
+13:22:09.7 |
HIP 17557 |
9.12 |
| 2026-04-06 00:00 |
03:45:15.14 |
+13:22:18.0 |
HIP 17557 |
9.02 |
| 2026-04-06 12:00 |
03:45:16.65 |
+13:22:26.3 |
HIP 17557 |
8.93 |
| 2026-04-07 00:00 |
03:45:18.18 |
+13:22:34.6 |
HIP 17557 |
8.87 |
| 2026-04-07 12:00 |
03:45:19.71 |
+13:22:42.9 |
HIP 17557 |
8.81 |
| 2026-04-08 00:00 |
03:45:21.26 |
+13:22:51.3 |
HIP 17557 |
8.78 |
| 2026-04-08 12:00 |
03:45:22.82 |
+13:22:59.7 |
HIP 17557 |
8.76 |
| 2026-04-09 00:00 |
03:45:24.39 |
+13:23:08.0 |
HIP 17557 |
8.76 |
| 2026-04-09 12:00 |
03:45:25.98 |
+13:23:16.4 |
HIP 17557 |
8.78 |
| 2026-04-10 00:00 |
03:45:27.57 |
+13:23:24.8 |
HIP 17557 |
8.81 |
| 2026-04-10 12:00 |
03:45:29.18 |
+13:23:33.2 |
HIP 17557 |
8.87 |
| 2026-04-11 00:00 |
03:45:30.80 |
+13:23:41.7 |
HIP 17557 |
8.94 |
| 2026-04-11 12:00 |
03:45:32.43 |
+13:23:50.1 |
HIP 17557 |
9.03 |
| 2026-04-12 00:00 |
03:45:34.07 |
+13:23:58.5 |
HIP 17557 |
9.14 |
| 2026-04-12 12:00 |
03:45:35.72 |
+13:24:07.0 |
HIP 17557 |
9.27 |
| 2026-04-13 00:00 |
03:45:37.38 |
+13:24:15.5 |
HIP 17557 |
9.42 |
| 2026-04-13 12:00 |
03:45:39.05 |
+13:24:23.9 |
HIP 17557 |
9.58 |
| 2026-04-14 00:00 |
03:45:40.74 |
+13:24:32.4 |
HIP 17557 |
9.76 |
| 2026-04-14 12:00 |
03:45:42.43 |
+13:24:40.9 |
HIP 17557 |
9.96 |
| 2026-04-15 00:00 |
03:45:44.13 |
+13:24:49.4 |
HIP 17557 |
10.17 |
| 2026-04-15 12:00 |
03:45:45.85 |
+13:24:57.9 |
HIP 17557 |
10.40 |
| 2026-04-16 00:00 |
03:45:47.57 |
+13:25:06.4 |
HIP 17557 |
10.64 |