메타데이터
| 항목 |
값 |
| Designation |
C/2004 K1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-07-05T02:28:32.972160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:41Z |
| Obs used |
1117 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
11.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-05-10.0000000 |
| e |
0.99813226 |
| q (au) |
3.399147 |
| a (au) |
1819.922556 |
| i (deg) |
153.747520 |
| Ω (om, deg) |
326.923197 |
| ω (w, deg) |
97.751687 |
| M (ma, deg) |
359.999288 |
밝기
산란 + 전체 선형
$$
M_a = (8.179 + 3.575\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.179 |
| n |
3.575 |
| gf |
0.984 |
| gb |
-0.503 |
| k |
1.000 |
| δ90 |
9.996 |
| 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 |
05:41:19.56 |
+00:27:34.2 |
HIP 26762 |
8.10 |
| 2026-05-12 12:00 |
05:41:21.75 |
+00:27:44.4 |
HIP 26762 |
8.50 |
| 2026-05-13 00:00 |
05:41:23.97 |
+00:27:54.4 |
HIP 26762 |
8.92 |
| 2026-05-13 12:00 |
05:41:26.19 |
+00:28:04.3 |
HIP 26762 |
9.36 |
| 2026-05-14 00:00 |
05:41:28.43 |
+00:28:14.0 |
HIP 26762 |
9.81 |
| 2026-05-14 12:00 |
05:41:30.68 |
+00:28:23.7 |
HIP 26762 |
10.27 |
| 2026-05-15 00:00 |
05:41:32.95 |
+00:28:33.2 |
HIP 26762 |
10.75 |
| 2026-05-15 12:00 |
05:41:35.23 |
+00:28:42.6 |
HIP 26762 |
11.24 |
| 2026-05-16 00:00 |
05:41:37.52 |
+00:28:51.9 |
HIP 26762 |
11.74 |
| 2026-05-16 12:00 |
05:41:39.82 |
+00:29:01.1 |
HIP 26762 |
12.24 |
| 2026-05-17 00:00 |
05:41:42.13 |
+00:29:10.1 |
HIP 26762 |
12.76 |
| 2026-05-17 12:00 |
05:41:44.46 |
+00:29:19.1 |
HIP 26762 |
13.28 |
| 2026-05-18 00:00 |
05:41:46.79 |
+00:29:27.9 |
HIP 26762 |
13.81 |
| 2026-05-18 12:00 |
05:41:49.14 |
+00:29:36.6 |
HIP 26762 |
14.35 |
| 2026-05-19 00:00 |
05:41:51.50 |
+00:29:45.1 |
HIP 26762 |
14.89 |
| 2026-05-19 12:00 |
05:41:53.87 |
+00:29:53.5 |
HIP 26762 |
15.44 |
| 2026-05-20 00:00 |
05:41:56.26 |
+00:30:01.8 |
HIP 26762 |
16.00 |
| 2026-05-20 12:00 |
05:41:58.65 |
+00:30:10.0 |
HIP 26762 |
16.55 |
| 2026-05-21 00:00 |
05:42:01.05 |
+00:30:18.1 |
HIP 26762 |
17.12 |
| 2026-05-21 12:00 |
05:42:03.46 |
+00:30:26.0 |
HIP 26762 |
17.69 |
| 2026-05-22 00:00 |
05:42:05.89 |
+00:30:33.8 |
HIP 26762 |
18.26 |
| 2026-05-22 12:00 |
05:42:08.32 |
+00:30:41.4 |
HIP 26762 |
18.83 |
| 2026-05-23 00:00 |
05:42:10.76 |
+00:30:49.0 |
HIP 26762 |
19.41 |
| 2026-05-23 12:00 |
05:42:13.21 |
+00:30:56.4 |
HIP 26762 |
20.00 |
| 2026-05-24 00:00 |
05:42:15.67 |
+00:31:03.7 |
HIP 26762 |
20.58 |
| 2026-05-24 12:00 |
05:42:18.14 |
+00:31:10.8 |
HIP 26762 |
21.17 |
| 2026-05-25 00:00 |
05:42:20.62 |
+00:31:17.8 |
HIP 26762 |
21.76 |
| 2026-05-25 12:00 |
05:42:23.11 |
+00:31:24.7 |
HIP 26762 |
22.36 |
| 2026-05-26 00:00 |
05:42:25.61 |
+00:31:31.5 |
HIP 26762 |
22.96 |
| 2026-05-26 12:00 |
05:42:28.11 |
+00:31:38.1 |
HIP 26762 |
23.56 |
| 2026-05-27 00:00 |
05:42:30.62 |
+00:31:44.6 |
HIP 26762 |
24.16 |
| 2026-05-27 12:00 |
05:42:33.14 |
+00:31:51.0 |
HIP 26762 |
24.77 |
| 2026-05-28 00:00 |
05:42:35.67 |
+00:31:57.2 |
HIP 26762 |
25.37 |
| 2026-05-28 12:00 |
05:42:38.21 |
+00:32:03.3 |
HIP 26762 |
25.98 |
| 2026-05-29 00:00 |
05:42:40.75 |
+00:32:09.3 |
HIP 26762 |
26.60 |
| 2026-05-29 12:00 |
05:42:43.30 |
+00:32:15.1 |
HIP 26762 |
27.21 |
| 2026-05-30 00:00 |
05:42:45.86 |
+00:32:20.8 |
HIP 26762 |
27.83 |
| 2026-05-30 12:00 |
05:42:48.42 |
+00:32:26.4 |
HIP 26762 |
28.45 |
| 2026-05-31 00:00 |
05:42:50.99 |
+00:32:31.8 |
HIP 26762 |
29.07 |
| 2026-05-31 12:00 |
05:42:53.57 |
+00:32:37.1 |
HIP 26762 |
29.69 |
| 2026-06-01 00:00 |
05:42:56.15 |
+00:32:42.3 |
HIP 27107 |
29.60 |
| 2026-06-01 12:00 |
05:42:58.74 |
+00:32:47.3 |
HIP 27107 |
28.95 |
| 2026-06-02 00:00 |
05:43:01.34 |
+00:32:52.2 |
HIP 27107 |
28.30 |