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 |
0.998 |
| 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) |
| 2026-07-29 00:00 |
05:47:49.20 |
+00:26:59.7 |
HIP 27309 |
13.73 |
| 2026-07-29 12:00 |
05:47:51.25 |
+00:26:49.0 |
HIP 27309 |
14.01 |
| 2026-07-30 00:00 |
05:47:53.28 |
+00:26:38.2 |
HIP 27309 |
14.29 |
| 2026-07-30 12:00 |
05:47:55.29 |
+00:26:27.2 |
HIP 27309 |
14.59 |
| 2026-07-31 00:00 |
05:47:57.29 |
+00:26:16.1 |
HIP 27309 |
14.89 |
| 2026-07-31 12:00 |
05:47:59.28 |
+00:26:04.9 |
HIP 27309 |
15.21 |
| 2026-08-01 00:00 |
05:48:01.25 |
+00:25:53.6 |
HIP 27309 |
15.53 |
| 2026-08-01 12:00 |
05:48:03.20 |
+00:25:42.2 |
HIP 27309 |
15.85 |
| 2026-08-02 00:00 |
05:48:05.14 |
+00:25:30.7 |
HIP 27309 |
16.19 |
| 2026-08-02 12:00 |
05:48:07.06 |
+00:25:19.1 |
HIP 27309 |
16.53 |
| 2026-08-03 00:00 |
05:48:08.97 |
+00:25:07.3 |
HIP 27309 |
16.87 |
| 2026-08-03 12:00 |
05:48:10.86 |
+00:24:55.4 |
HIP 27309 |
17.22 |
| 2026-08-04 00:00 |
05:48:12.73 |
+00:24:43.5 |
HIP 27309 |
17.57 |
| 2026-08-04 12:00 |
05:48:14.58 |
+00:24:31.4 |
HIP 27309 |
17.92 |
| 2026-08-05 00:00 |
05:48:16.42 |
+00:24:19.2 |
HIP 27309 |
18.28 |
| 2026-08-05 12:00 |
05:48:18.25 |
+00:24:06.9 |
HIP 27309 |
18.64 |
| 2026-08-06 00:00 |
05:48:20.05 |
+00:23:54.5 |
HIP 27309 |
19.00 |
| 2026-08-06 12:00 |
05:48:21.84 |
+00:23:41.9 |
HIP 27309 |
19.36 |
| 2026-08-07 00:00 |
05:48:23.61 |
+00:23:29.3 |
HIP 27309 |
19.72 |
| 2026-08-07 12:00 |
05:48:25.37 |
+00:23:16.6 |
HIP 27309 |
20.09 |
| 2026-08-08 00:00 |
05:48:27.11 |
+00:23:03.7 |
HIP 27309 |
20.45 |
| 2026-08-08 12:00 |
05:48:28.82 |
+00:22:50.8 |
HIP 27309 |
20.81 |
| 2026-08-09 00:00 |
05:48:30.52 |
+00:22:37.7 |
HIP 27309 |
21.18 |
| 2026-08-09 12:00 |
05:48:32.21 |
+00:22:24.6 |
HIP 27452 |
21.40 |
| 2026-08-10 00:00 |
05:48:33.87 |
+00:22:11.3 |
HIP 27452 |
21.56 |
| 2026-08-10 12:00 |
05:48:35.52 |
+00:21:57.9 |
HIP 27452 |
21.73 |
| 2026-08-11 00:00 |
05:48:37.15 |
+00:21:44.5 |
HIP 27452 |
21.90 |
| 2026-08-11 12:00 |
05:48:38.75 |
+00:21:30.9 |
HIP 27452 |
22.09 |
| 2026-08-12 00:00 |
05:48:40.35 |
+00:21:17.2 |
HIP 27507 |
22.15 |
| 2026-08-12 12:00 |
05:48:41.92 |
+00:21:03.5 |
HIP 27507 |
21.74 |
| 2026-08-13 00:00 |
05:48:43.47 |
+00:20:49.6 |
HIP 27507 |
21.34 |
| 2026-08-13 12:00 |
05:48:45.00 |
+00:20:35.7 |
HIP 27507 |
20.93 |
| 2026-08-14 00:00 |
05:48:46.51 |
+00:20:21.6 |
HIP 27507 |
20.54 |
| 2026-08-14 12:00 |
05:48:48.01 |
+00:20:07.5 |
HIP 27507 |
20.14 |
| 2026-08-15 00:00 |
05:48:49.48 |
+00:19:53.2 |
HIP 27507 |
19.75 |
| 2026-08-15 12:00 |
05:48:50.94 |
+00:19:38.9 |
HIP 27507 |
19.36 |
| 2026-08-16 00:00 |
05:48:52.37 |
+00:19:24.5 |
HIP 27507 |
18.97 |
| 2026-08-16 12:00 |
05:48:53.78 |
+00:19:09.9 |
HIP 27507 |
18.59 |
| 2026-08-17 00:00 |
05:48:55.18 |
+00:18:55.3 |
HIP 27507 |
18.21 |
| 2026-08-17 12:00 |
05:48:56.55 |
+00:18:40.6 |
HIP 27507 |
17.83 |
| 2026-08-18 00:00 |
05:48:57.90 |
+00:18:25.8 |
HIP 27507 |
17.46 |
| 2026-08-18 12:00 |
05:48:59.24 |
+00:18:11.0 |
HIP 27507 |
17.09 |
| 2026-08-19 00:00 |
05:49:00.55 |
+00:17:56.0 |
HIP 27507 |
16.72 |