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) |
| 2026-07-29 00:00 |
06:21:18.47 |
-01:29:06.7 |
HIP 30136 |
13.67 |
| 2026-07-29 12:00 |
06:21:20.70 |
-01:29:16.1 |
HIP 30136 |
14.23 |
| 2026-07-30 00:00 |
06:21:22.92 |
-01:29:25.6 |
HIP 30136 |
14.79 |
| 2026-07-30 12:00 |
06:21:25.12 |
-01:29:35.3 |
HIP 30136 |
15.35 |
| 2026-07-31 00:00 |
06:21:27.32 |
-01:29:45.0 |
HIP 30136 |
15.91 |
| 2026-07-31 12:00 |
06:21:29.51 |
-01:29:54.8 |
HIP 30136 |
16.46 |
| 2026-08-01 00:00 |
06:21:31.69 |
-01:30:04.8 |
HIP 30136 |
17.02 |
| 2026-08-01 12:00 |
06:21:33.85 |
-01:30:14.9 |
HIP 30210 |
17.34 |
| 2026-08-02 00:00 |
06:21:36.01 |
-01:30:25.0 |
HIP 30210 |
17.62 |
| 2026-08-02 12:00 |
06:21:38.15 |
-01:30:35.3 |
HIP 30210 |
17.91 |
| 2026-08-03 00:00 |
06:21:40.28 |
-01:30:45.7 |
HIP 30210 |
18.21 |
| 2026-08-03 12:00 |
06:21:42.40 |
-01:30:56.1 |
HIP 30210 |
18.53 |
| 2026-08-04 00:00 |
06:21:44.50 |
-01:31:06.7 |
HIP 30210 |
18.86 |
| 2026-08-04 12:00 |
06:21:46.60 |
-01:31:17.4 |
HIP 30210 |
19.21 |
| 2026-08-05 00:00 |
06:21:48.68 |
-01:31:28.2 |
HIP 30210 |
19.56 |
| 2026-08-05 12:00 |
06:21:50.75 |
-01:31:39.0 |
HIP 30210 |
19.92 |
| 2026-08-06 00:00 |
06:21:52.81 |
-01:31:50.0 |
HIP 30210 |
20.29 |
| 2026-08-06 12:00 |
06:21:54.85 |
-01:32:01.1 |
HIP 30210 |
20.67 |
| 2026-08-07 00:00 |
06:21:56.89 |
-01:32:12.3 |
HIP 30210 |
21.05 |
| 2026-08-07 12:00 |
06:21:58.91 |
-01:32:23.6 |
HIP 30210 |
21.44 |
| 2026-08-08 00:00 |
06:22:00.91 |
-01:32:34.9 |
HIP 30210 |
21.84 |
| 2026-08-08 12:00 |
06:22:02.90 |
-01:32:46.4 |
HIP 30210 |
22.24 |
| 2026-08-09 00:00 |
06:22:04.88 |
-01:32:58.0 |
HIP 30210 |
22.65 |
| 2026-08-09 12:00 |
06:22:06.85 |
-01:33:09.6 |
HIP 30210 |
23.07 |
| 2026-08-10 00:00 |
06:22:08.80 |
-01:33:21.4 |
HIP 30210 |
23.48 |
| 2026-08-10 12:00 |
06:22:10.74 |
-01:33:33.2 |
HIP 30210 |
23.90 |
| 2026-08-11 00:00 |
06:22:12.67 |
-01:33:45.2 |
HIP 30210 |
24.33 |
| 2026-08-11 12:00 |
06:22:14.58 |
-01:33:57.2 |
HIP 30210 |
24.76 |
| 2026-08-12 00:00 |
06:22:16.47 |
-01:34:09.4 |
HIP 30210 |
25.19 |
| 2026-08-12 12:00 |
06:22:18.35 |
-01:34:21.6 |
HIP 30210 |
25.62 |
| 2026-08-13 00:00 |
06:22:20.22 |
-01:34:33.9 |
HIP 30210 |
26.06 |
| 2026-08-13 12:00 |
06:22:22.07 |
-01:34:46.3 |
HIP 30210 |
26.49 |
| 2026-08-14 00:00 |
06:22:23.91 |
-01:34:58.8 |
HIP 30210 |
26.93 |
| 2026-08-14 12:00 |
06:22:25.74 |
-01:35:11.4 |
HIP 30266 |
27.27 |
| 2026-08-15 00:00 |
06:22:27.54 |
-01:35:24.0 |
HIP 30266 |
27.17 |
| 2026-08-15 12:00 |
06:22:29.34 |
-01:35:36.8 |
HIP 30266 |
27.07 |
| 2026-08-16 00:00 |
06:22:31.11 |
-01:35:49.6 |
HIP 30266 |
26.99 |
| 2026-08-16 12:00 |
06:22:32.88 |
-01:36:02.5 |
HIP 30266 |
26.91 |
| 2026-08-17 00:00 |
06:22:34.62 |
-01:36:15.5 |
HIP 30266 |
26.83 |
| 2026-08-17 12:00 |
06:22:36.35 |
-01:36:28.6 |
HIP 30266 |
26.76 |
| 2026-08-18 00:00 |
06:22:38.07 |
-01:36:41.8 |
HIP 30266 |
26.70 |
| 2026-08-18 12:00 |
06:22:39.77 |
-01:36:55.0 |
HIP 30266 |
26.64 |
| 2026-08-19 00:00 |
06:22:41.45 |
-01:37:08.3 |
HIP 30266 |
26.59 |