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) |
| 2026-03-26 00:00 |
01:55:00.13 |
+35:52:51.6 |
HIP 8948 |
7.87 |
| 2026-03-26 12:00 |
01:55:02.97 |
+35:52:56.8 |
HIP 8948 |
7.58 |
| 2026-03-27 00:00 |
01:55:05.81 |
+35:53:02.2 |
HIP 8948 |
7.33 |
| 2026-03-27 12:00 |
01:55:08.67 |
+35:53:07.7 |
HIP 8948 |
7.12 |
| 2026-03-28 00:00 |
01:55:11.54 |
+35:53:13.5 |
HIP 8948 |
6.94 |
| 2026-03-28 12:00 |
01:55:14.42 |
+35:53:19.4 |
HIP 8948 |
6.81 |
| 2026-03-29 00:00 |
01:55:17.30 |
+35:53:25.5 |
HIP 8948 |
6.73 |
| 2026-03-29 12:00 |
01:55:20.20 |
+35:53:31.7 |
HIP 8948 |
6.69 |
| 2026-03-30 00:00 |
01:55:23.11 |
+35:53:38.2 |
HIP 8948 |
6.71 |
| 2026-03-30 12:00 |
01:55:26.03 |
+35:53:44.8 |
HIP 8948 |
6.77 |
| 2026-03-31 00:00 |
01:55:28.95 |
+35:53:51.5 |
HIP 8948 |
6.89 |
| 2026-03-31 12:00 |
01:55:31.89 |
+35:53:58.5 |
HIP 8948 |
7.05 |
| 2026-04-01 00:00 |
01:55:34.83 |
+35:54:05.6 |
HIP 8948 |
7.26 |
| 2026-04-01 12:00 |
01:55:37.78 |
+35:54:12.9 |
HIP 8948 |
7.51 |
| 2026-04-02 00:00 |
01:55:40.75 |
+35:54:20.3 |
HIP 8948 |
7.80 |
| 2026-04-02 12:00 |
01:55:43.72 |
+35:54:27.9 |
HIP 8948 |
8.13 |
| 2026-04-03 00:00 |
01:55:46.70 |
+35:54:35.7 |
HIP 8948 |
8.49 |
| 2026-04-03 12:00 |
01:55:49.68 |
+35:54:43.7 |
HIP 8948 |
8.87 |
| 2026-04-04 00:00 |
01:55:52.68 |
+35:54:51.8 |
HIP 8948 |
9.28 |
| 2026-04-04 12:00 |
01:55:55.68 |
+35:55:00.0 |
HIP 8948 |
9.71 |
| 2026-04-05 00:00 |
01:55:58.69 |
+35:55:08.5 |
HIP 8948 |
10.17 |
| 2026-04-05 12:00 |
01:56:01.70 |
+35:55:17.1 |
HIP 8948 |
10.64 |
| 2026-04-06 00:00 |
01:56:04.73 |
+35:55:25.9 |
HIP 8948 |
11.12 |
| 2026-04-06 12:00 |
01:56:07.76 |
+35:55:34.8 |
HIP 8948 |
11.62 |
| 2026-04-07 00:00 |
01:56:10.79 |
+35:55:43.9 |
HIP 8948 |
12.13 |
| 2026-04-07 12:00 |
01:56:13.83 |
+35:55:53.2 |
HIP 8948 |
12.65 |
| 2026-04-08 00:00 |
01:56:16.88 |
+35:56:02.6 |
HIP 8948 |
13.19 |
| 2026-04-08 12:00 |
01:56:19.94 |
+35:56:12.2 |
HIP 8948 |
13.73 |
| 2026-04-09 00:00 |
01:56:23.00 |
+35:56:21.9 |
HIP 8948 |
14.28 |
| 2026-04-09 12:00 |
01:56:26.07 |
+35:56:31.8 |
HIP 8948 |
14.84 |
| 2026-04-10 00:00 |
01:56:29.14 |
+35:56:41.9 |
HIP 8948 |
15.40 |
| 2026-04-10 12:00 |
01:56:32.21 |
+35:56:52.1 |
HIP 8948 |
15.98 |
| 2026-04-11 00:00 |
01:56:35.30 |
+35:57:02.4 |
HIP 8948 |
16.55 |
| 2026-04-11 12:00 |
01:56:38.38 |
+35:57:13.0 |
HIP 8948 |
17.14 |
| 2026-04-12 00:00 |
01:56:41.47 |
+35:57:23.6 |
HIP 8948 |
17.72 |
| 2026-04-12 12:00 |
01:56:44.57 |
+35:57:34.5 |
HIP 8948 |
18.32 |
| 2026-04-13 00:00 |
01:56:47.67 |
+35:57:45.5 |
HIP 8948 |
18.91 |
| 2026-04-13 12:00 |
01:56:50.77 |
+35:57:56.6 |
HIP 9060 |
19.29 |
| 2026-04-14 00:00 |
01:56:53.88 |
+35:58:07.9 |
HIP 9060 |
19.56 |
| 2026-04-14 12:00 |
01:56:56.99 |
+35:58:19.4 |
HIP 9060 |
19.86 |
| 2026-04-15 00:00 |
01:57:00.10 |
+35:58:31.0 |
HIP 9060 |
20.17 |
| 2026-04-15 12:00 |
01:57:03.22 |
+35:58:42.7 |
HIP 9060 |
20.50 |
| 2026-04-16 00:00 |
01:57:06.34 |
+35:58:54.6 |
HIP 9060 |
20.86 |