메타데이터
| 항목 |
값 |
| Designation |
C/2000 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-10-11T08:50:10.268160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
315 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2001-01-24.0000000 |
| e |
0.99533458 |
| q (au) |
2.437066 |
| a (au) |
522.368250 |
| i (deg) |
25.633558 |
| Ω (om, deg) |
195.261038 |
| ω (w, deg) |
106.826472 |
| M (ma, deg) |
0.008638 |
밝기
산란 + 전체 선형
$$
M_a = (11.118 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.118 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.947 |
| 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 |
| 2000-05-04 |
2000-10-07 |
+29.0488 |
-11.898 |
| 2000-10-14 |
2003-01-16 |
+4.6075 |
-3.437 |
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 |
06:13:14.12 |
-01:51:37.4 |
HIP 29552 |
6.05 |
| 2026-03-26 12:00 |
06:13:14.31 |
-01:51:21.1 |
HIP 29552 |
5.91 |
| 2026-03-27 00:00 |
06:13:14.53 |
-01:51:04.8 |
HIP 29552 |
5.77 |
| 2026-03-27 12:00 |
06:13:14.77 |
-01:50:48.5 |
HIP 29552 |
5.64 |
| 2026-03-28 00:00 |
06:13:15.03 |
-01:50:32.2 |
HIP 29552 |
5.51 |
| 2026-03-28 12:00 |
06:13:15.31 |
-01:50:16.0 |
HIP 29552 |
5.39 |
| 2026-03-29 00:00 |
06:13:15.61 |
-01:49:59.8 |
HIP 29552 |
5.28 |
| 2026-03-29 12:00 |
06:13:15.94 |
-01:49:43.6 |
HIP 29552 |
5.17 |
| 2026-03-30 00:00 |
06:13:16.28 |
-01:49:27.4 |
HIP 29552 |
5.07 |
| 2026-03-30 12:00 |
06:13:16.65 |
-01:49:11.3 |
HIP 29552 |
4.98 |
| 2026-03-31 00:00 |
06:13:17.04 |
-01:48:55.2 |
HIP 29552 |
4.90 |
| 2026-03-31 12:00 |
06:13:17.46 |
-01:48:39.1 |
HIP 29552 |
4.83 |
| 2026-04-01 00:00 |
06:13:17.89 |
-01:48:23.1 |
HIP 29552 |
4.77 |
| 2026-04-01 12:00 |
06:13:18.35 |
-01:48:07.1 |
HIP 29552 |
4.72 |
| 2026-04-02 00:00 |
06:13:18.83 |
-01:47:51.1 |
HIP 29552 |
4.69 |
| 2026-04-02 12:00 |
06:13:19.33 |
-01:47:35.2 |
HIP 29552 |
4.66 |
| 2026-04-03 00:00 |
06:13:19.85 |
-01:47:19.3 |
HIP 29552 |
4.65 |
| 2026-04-03 12:00 |
06:13:20.39 |
-01:47:03.4 |
HIP 29552 |
4.65 |
| 2026-04-04 00:00 |
06:13:20.95 |
-01:46:47.6 |
HIP 29552 |
4.67 |
| 2026-04-04 12:00 |
06:13:21.54 |
-01:46:31.8 |
HIP 29552 |
4.70 |
| 2026-04-05 00:00 |
06:13:22.15 |
-01:46:16.0 |
HIP 29552 |
4.75 |
| 2026-04-05 12:00 |
06:13:22.77 |
-01:46:00.3 |
HIP 29552 |
4.81 |
| 2026-04-06 00:00 |
06:13:23.42 |
-01:45:44.7 |
HIP 29552 |
4.88 |
| 2026-04-06 12:00 |
06:13:24.09 |
-01:45:29.1 |
HIP 29552 |
4.97 |
| 2026-04-07 00:00 |
06:13:24.79 |
-01:45:13.5 |
HIP 29552 |
5.08 |
| 2026-04-07 12:00 |
06:13:25.50 |
-01:44:58.0 |
HIP 29552 |
5.19 |
| 2026-04-08 00:00 |
06:13:26.23 |
-01:44:42.5 |
HIP 29552 |
5.32 |
| 2026-04-08 12:00 |
06:13:26.99 |
-01:44:27.0 |
HIP 29552 |
5.46 |
| 2026-04-09 00:00 |
06:13:27.76 |
-01:44:11.7 |
HIP 29552 |
5.61 |
| 2026-04-09 12:00 |
06:13:28.56 |
-01:43:56.3 |
HIP 29552 |
5.78 |
| 2026-04-10 00:00 |
06:13:29.38 |
-01:43:41.0 |
HIP 29552 |
5.95 |
| 2026-04-10 12:00 |
06:13:30.22 |
-01:43:25.8 |
HIP 29552 |
6.14 |
| 2026-04-11 00:00 |
06:13:31.08 |
-01:43:10.6 |
HIP 29552 |
6.33 |
| 2026-04-11 12:00 |
06:13:31.96 |
-01:42:55.5 |
HIP 29552 |
6.54 |
| 2026-04-12 00:00 |
06:13:32.86 |
-01:42:40.4 |
HIP 29552 |
6.75 |
| 2026-04-12 12:00 |
06:13:33.78 |
-01:42:25.4 |
HIP 29552 |
6.97 |
| 2026-04-13 00:00 |
06:13:34.72 |
-01:42:10.5 |
HIP 29552 |
7.20 |
| 2026-04-13 12:00 |
06:13:35.68 |
-01:41:55.6 |
HIP 29552 |
7.43 |
| 2026-04-14 00:00 |
06:13:36.66 |
-01:41:40.7 |
HIP 29552 |
7.68 |
| 2026-04-14 12:00 |
06:13:37.66 |
-01:41:26.0 |
HIP 29552 |
7.93 |
| 2026-04-15 00:00 |
06:13:38.69 |
-01:41:11.2 |
HIP 29552 |
8.19 |
| 2026-04-15 12:00 |
06:13:39.73 |
-01:40:56.6 |
HIP 29552 |
8.45 |
| 2026-04-16 00:00 |
06:13:40.79 |
-01:40:42.0 |
HIP 29552 |
8.72 |