메타데이터
| 항목 |
값 |
| Designation |
C/2005 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-07-05T09:27:35.389440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-16T12:09:59Z |
| Obs used |
13 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-05-20.0000000 |
| e |
0.99999380 |
| q (au) |
0.544577 |
| a (au) |
87777.427104 |
| i (deg) |
102.045031 |
| Ω (om, deg) |
45.711970 |
| ω (w, deg) |
216.580465 |
| M (ma, deg) |
359.999998 |
밝기
산란 + 전체 선형
$$
M_a = (12.756 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.756 |
| n |
6.000 |
| gf |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2005-05-19 |
2005-06-11 |
+24.1511 |
+1.942 |
| 2005-06-11 |
2005-06-27 |
-13.3690 |
-1.981 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
01:59:46.85 |
+36:12:13.6 |
HIP 9217 |
15.58 |
| 2026-05-12 12:00 |
01:59:49.80 |
+36:12:31.9 |
HIP 9217 |
16.11 |
| 2026-05-13 00:00 |
01:59:52.75 |
+36:12:50.3 |
HIP 9217 |
16.65 |
| 2026-05-13 12:00 |
01:59:55.69 |
+36:13:08.9 |
HIP 9217 |
17.20 |
| 2026-05-14 00:00 |
01:59:58.62 |
+36:13:27.5 |
HIP 9217 |
17.76 |
| 2026-05-14 12:00 |
02:00:01.54 |
+36:13:46.2 |
HIP 9217 |
18.32 |
| 2026-05-15 00:00 |
02:00:04.46 |
+36:14:05.0 |
HIP 9217 |
18.89 |
| 2026-05-15 12:00 |
02:00:07.36 |
+36:14:23.9 |
HIP 9217 |
19.46 |
| 2026-05-16 00:00 |
02:00:10.25 |
+36:14:42.8 |
HIP 9217 |
20.03 |
| 2026-05-16 12:00 |
02:00:13.14 |
+36:15:01.9 |
HIP 9217 |
20.61 |
| 2026-05-17 00:00 |
02:00:16.01 |
+36:15:21.0 |
HIP 9217 |
21.19 |
| 2026-05-17 12:00 |
02:00:18.87 |
+36:15:40.3 |
HIP 9217 |
21.77 |
| 2026-05-18 00:00 |
02:00:21.72 |
+36:15:59.6 |
HIP 9217 |
22.35 |
| 2026-05-18 12:00 |
02:00:24.57 |
+36:16:18.9 |
HIP 9217 |
22.94 |
| 2026-05-19 00:00 |
02:00:27.40 |
+36:16:38.4 |
HIP 9217 |
23.53 |
| 2026-05-19 12:00 |
02:00:30.21 |
+36:16:57.9 |
HIP 9217 |
24.12 |
| 2026-05-20 00:00 |
02:00:33.02 |
+36:17:17.5 |
HIP 9217 |
24.71 |
| 2026-05-20 12:00 |
02:00:35.82 |
+36:17:37.2 |
HIP 9217 |
25.30 |
| 2026-05-21 00:00 |
02:00:38.60 |
+36:17:57.0 |
HIP 9217 |
25.89 |
| 2026-05-21 12:00 |
02:00:41.37 |
+36:18:16.8 |
HIP 9217 |
26.48 |
| 2026-05-22 00:00 |
02:00:44.13 |
+36:18:36.7 |
HIP 9342 |
26.93 |
| 2026-05-22 12:00 |
02:00:46.88 |
+36:18:56.7 |
HIP 9342 |
26.81 |
| 2026-05-23 00:00 |
02:00:49.61 |
+36:19:16.7 |
HIP 9342 |
26.72 |
| 2026-05-23 12:00 |
02:00:52.34 |
+36:19:36.8 |
HIP 9342 |
26.63 |
| 2026-05-24 00:00 |
02:00:55.04 |
+36:19:57.0 |
HIP 9342 |
26.56 |
| 2026-05-24 12:00 |
02:00:57.74 |
+36:20:17.2 |
HIP 9342 |
26.50 |
| 2026-05-25 00:00 |
02:01:00.42 |
+36:20:37.5 |
HIP 9342 |
26.45 |
| 2026-05-25 12:00 |
02:01:03.09 |
+36:20:57.9 |
HIP 9500 |
26.13 |
| 2026-05-26 00:00 |
02:01:05.75 |
+36:21:18.3 |
HIP 9500 |
25.56 |
| 2026-05-26 12:00 |
02:01:08.39 |
+36:21:38.7 |
HIP 9500 |
24.99 |
| 2026-05-27 00:00 |
02:01:11.02 |
+36:21:59.3 |
HIP 9500 |
24.43 |
| 2026-05-27 12:00 |
02:01:13.63 |
+36:22:19.8 |
HIP 9500 |
23.87 |
| 2026-05-28 00:00 |
02:01:16.23 |
+36:22:40.5 |
HIP 9500 |
23.31 |
| 2026-05-28 12:00 |
02:01:18.81 |
+36:23:01.2 |
HIP 9500 |
22.76 |
| 2026-05-29 00:00 |
02:01:21.38 |
+36:23:21.9 |
HIP 9500 |
22.21 |
| 2026-05-29 12:00 |
02:01:23.94 |
+36:23:42.7 |
HIP 9500 |
21.67 |
| 2026-05-30 00:00 |
02:01:26.48 |
+36:24:03.6 |
HIP 9500 |
21.13 |
| 2026-05-30 12:00 |
02:01:29.01 |
+36:24:24.5 |
HIP 9500 |
20.59 |
| 2026-05-31 00:00 |
02:01:31.52 |
+36:24:45.4 |
HIP 9500 |
20.07 |
| 2026-05-31 12:00 |
02:01:34.01 |
+36:25:06.4 |
HIP 9500 |
19.54 |
| 2026-06-01 00:00 |
02:01:36.49 |
+36:25:27.5 |
HIP 9500 |
19.02 |
| 2026-06-01 12:00 |
02:01:38.95 |
+36:25:48.5 |
HIP 9500 |
18.51 |
| 2026-06-02 00:00 |
02:01:41.40 |
+36:26:09.7 |
HIP 9500 |
18.01 |