메타데이터
| 항목 |
값 |
| Designation |
C/1999 K8 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-04-24T06:58:48.679680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
610 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
5.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-03-20.0000000 |
| e |
1.00071246 |
| q (au) |
4.200554 |
| a (au) |
-5895.868027 |
| i (deg) |
52.733975 |
| Ω (om, deg) |
195.394218 |
| ω (w, deg) |
164.619681 |
| M (ma, deg) |
-0.000077 |
밝기
산란 + 전체 선형
$$
M_a = (5.474 + 3.588\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.474 |
| n |
3.588 |
| 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 |
| 1998-08-19 |
2000-02-01 |
+9.8022 |
-7.106 |
| 2000-05-28 |
2001-08-18 |
+4.3226 |
-3.002 |
| 2001-08-18 |
2003-03-07 |
-5.0352 |
+4.588 |
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 |
09:40:44.18 |
-25:56:19.2 |
HIP 47465 |
22.69 |
| 2026-07-29 12:00 |
09:40:46.88 |
-25:56:20.8 |
HIP 47465 |
22.74 |
| 2026-07-30 00:00 |
09:40:49.59 |
-25:56:22.6 |
HIP 47465 |
22.80 |
| 2026-07-30 12:00 |
09:40:52.30 |
-25:56:24.6 |
HIP 47465 |
22.88 |
| 2026-07-31 00:00 |
09:40:55.02 |
-25:56:26.9 |
HIP 47465 |
22.97 |
| 2026-07-31 12:00 |
09:40:57.75 |
-25:56:29.3 |
HIP 47465 |
23.07 |
| 2026-08-01 00:00 |
09:41:00.48 |
-25:56:32.0 |
HIP 47465 |
23.18 |
| 2026-08-01 12:00 |
09:41:03.21 |
-25:56:34.9 |
HIP 47465 |
23.31 |
| 2026-08-02 00:00 |
09:41:05.95 |
-25:56:38.0 |
HIP 47465 |
23.45 |
| 2026-08-02 12:00 |
09:41:08.69 |
-25:56:41.3 |
HIP 47465 |
23.60 |
| 2026-08-03 00:00 |
09:41:11.44 |
-25:56:44.8 |
HIP 47465 |
23.76 |
| 2026-08-03 12:00 |
09:41:14.19 |
-25:56:48.5 |
HIP 47465 |
23.94 |
| 2026-08-04 00:00 |
09:41:16.95 |
-25:56:52.5 |
HIP 47465 |
24.13 |
| 2026-08-04 12:00 |
09:41:19.71 |
-25:56:56.6 |
HIP 47465 |
24.32 |
| 2026-08-05 00:00 |
09:41:22.48 |
-25:57:01.0 |
HIP 47465 |
24.54 |
| 2026-08-05 12:00 |
09:41:25.25 |
-25:57:05.6 |
HIP 47465 |
24.76 |
| 2026-08-06 00:00 |
09:41:28.02 |
-25:57:10.4 |
HIP 47465 |
24.99 |
| 2026-08-06 12:00 |
09:41:30.80 |
-25:57:15.4 |
HIP 47465 |
25.23 |
| 2026-08-07 00:00 |
09:41:33.58 |
-25:57:20.6 |
HIP 47465 |
25.49 |
| 2026-08-07 12:00 |
09:41:36.36 |
-25:57:26.0 |
HIP 47465 |
25.75 |
| 2026-08-08 00:00 |
09:41:39.14 |
-25:57:31.6 |
HIP 47465 |
26.03 |
| 2026-08-08 12:00 |
09:41:41.93 |
-25:57:37.5 |
HIP 47465 |
26.31 |
| 2026-08-09 00:00 |
09:41:44.72 |
-25:57:43.5 |
HIP 47465 |
26.61 |
| 2026-08-09 12:00 |
09:41:47.52 |
-25:57:49.8 |
HIP 47465 |
26.91 |
| 2026-08-10 00:00 |
09:41:50.31 |
-25:57:56.2 |
HIP 47732 |
26.50 |
| 2026-08-10 12:00 |
09:41:53.11 |
-25:58:02.9 |
HIP 47732 |
25.87 |
| 2026-08-11 00:00 |
09:41:55.91 |
-25:58:09.8 |
HIP 47732 |
25.25 |
| 2026-08-11 12:00 |
09:41:58.71 |
-25:58:16.9 |
HIP 47732 |
24.62 |
| 2026-08-12 00:00 |
09:42:01.51 |
-25:58:24.2 |
HIP 47732 |
24.00 |
| 2026-08-12 12:00 |
09:42:04.32 |
-25:58:31.7 |
HIP 47732 |
23.37 |
| 2026-08-13 00:00 |
09:42:07.12 |
-25:58:39.4 |
HIP 47732 |
22.75 |
| 2026-08-13 12:00 |
09:42:09.93 |
-25:58:47.3 |
HIP 47732 |
22.12 |
| 2026-08-14 00:00 |
09:42:12.74 |
-25:58:55.4 |
HIP 47732 |
21.50 |
| 2026-08-14 12:00 |
09:42:15.54 |
-25:59:03.8 |
HIP 47732 |
20.88 |
| 2026-08-15 00:00 |
09:42:18.35 |
-25:59:12.3 |
HIP 47732 |
20.27 |
| 2026-08-15 12:00 |
09:42:21.16 |
-25:59:21.0 |
HIP 47732 |
19.65 |
| 2026-08-16 00:00 |
09:42:23.97 |
-25:59:29.9 |
HIP 47732 |
19.04 |
| 2026-08-16 12:00 |
09:42:26.78 |
-25:59:39.1 |
HIP 47732 |
18.43 |
| 2026-08-17 00:00 |
09:42:29.58 |
-25:59:48.4 |
HIP 47732 |
17.82 |
| 2026-08-17 12:00 |
09:42:32.39 |
-25:59:57.9 |
HIP 47732 |
17.22 |
| 2026-08-18 00:00 |
09:42:35.20 |
-26:00:07.7 |
HIP 47732 |
16.62 |
| 2026-08-18 12:00 |
09:42:38.00 |
-26:00:17.6 |
HIP 47732 |
16.02 |
| 2026-08-19 00:00 |
09:42:40.80 |
-26:00:27.7 |
HIP 47732 |
15.43 |