메타데이터
| 항목 |
값 |
| Designation |
C/1999 K7 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-02-24T18:38:47.711040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-06-03.0000000 |
| e |
0.99652152 |
| q (au) |
2.322718 |
| a (au) |
667.740065 |
| i (deg) |
135.158550 |
| Ω (om, deg) |
50.330978 |
| ω (w, deg) |
104.660079 |
| M (ma, deg) |
0.005611 |
밝기
산란 + 전체 선형
$$
M_a = (14.412 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.412 |
| n |
2.000 |
| gf |
0.999 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
09:11:56.00 |
-30:38:44.3 |
HIP 45227 |
20.91 |
| 2026-05-12 12:00 |
09:11:56.12 |
-30:38:18.0 |
HIP 45227 |
21.22 |
| 2026-05-13 00:00 |
09:11:56.26 |
-30:37:51.7 |
HIP 45227 |
21.53 |
| 2026-05-13 12:00 |
09:11:56.43 |
-30:37:25.5 |
HIP 45227 |
21.83 |
| 2026-05-14 00:00 |
09:11:56.62 |
-30:36:59.5 |
HIP 45227 |
22.14 |
| 2026-05-14 12:00 |
09:11:56.83 |
-30:36:33.5 |
HIP 45227 |
22.45 |
| 2026-05-15 00:00 |
09:11:57.06 |
-30:36:07.6 |
HIP 45227 |
22.76 |
| 2026-05-15 12:00 |
09:11:57.32 |
-30:35:41.9 |
HIP 45227 |
23.07 |
| 2026-05-16 00:00 |
09:11:57.60 |
-30:35:16.2 |
HIP 45227 |
23.37 |
| 2026-05-16 12:00 |
09:11:57.90 |
-30:34:50.6 |
HIP 45227 |
23.68 |
| 2026-05-17 00:00 |
09:11:58.22 |
-30:34:25.2 |
HIP 45227 |
23.99 |
| 2026-05-17 12:00 |
09:11:58.57 |
-30:33:59.9 |
HIP 45227 |
24.29 |
| 2026-05-18 00:00 |
09:11:58.94 |
-30:33:34.7 |
HIP 45227 |
24.60 |
| 2026-05-18 12:00 |
09:11:59.33 |
-30:33:09.5 |
HIP 45227 |
24.90 |
| 2026-05-19 00:00 |
09:11:59.74 |
-30:32:44.6 |
HIP 45227 |
25.21 |
| 2026-05-19 12:00 |
09:12:00.18 |
-30:32:19.7 |
HIP 45227 |
25.51 |
| 2026-05-20 00:00 |
09:12:00.64 |
-30:31:54.9 |
HIP 45227 |
25.81 |
| 2026-05-20 12:00 |
09:12:01.12 |
-30:31:30.3 |
HIP 45227 |
26.11 |
| 2026-05-21 00:00 |
09:12:01.62 |
-30:31:05.8 |
HIP 45227 |
26.41 |
| 2026-05-21 12:00 |
09:12:02.14 |
-30:30:41.4 |
HIP 45227 |
26.71 |
| 2026-05-22 00:00 |
09:12:02.69 |
-30:30:17.2 |
HIP 45227 |
27.01 |
| 2026-05-22 12:00 |
09:12:03.26 |
-30:29:53.0 |
HIP 45227 |
27.31 |
| 2026-05-23 00:00 |
09:12:03.85 |
-30:29:29.0 |
HIP 45227 |
27.61 |
| 2026-05-23 12:00 |
09:12:04.46 |
-30:29:05.2 |
HIP 45227 |
27.91 |
| 2026-05-24 00:00 |
09:12:05.10 |
-30:28:41.4 |
HIP 45227 |
28.20 |
| 2026-05-24 12:00 |
09:12:05.75 |
-30:28:17.8 |
HIP 45227 |
28.50 |
| 2026-05-25 00:00 |
09:12:06.43 |
-30:27:54.4 |
HIP 45001 |
28.66 |
| 2026-05-25 12:00 |
09:12:07.12 |
-30:27:31.1 |
HIP 45001 |
28.73 |
| 2026-05-26 00:00 |
09:12:07.84 |
-30:27:07.9 |
HIP 45001 |
28.81 |
| 2026-05-26 12:00 |
09:12:08.58 |
-30:26:44.8 |
HIP 45001 |
28.90 |
| 2026-05-27 00:00 |
09:12:09.34 |
-30:26:21.9 |
HIP 45001 |
29.01 |
| 2026-05-27 12:00 |
09:12:10.13 |
-30:25:59.1 |
HIP 45001 |
29.12 |
| 2026-05-28 00:00 |
09:12:10.93 |
-30:25:36.5 |
HIP 45001 |
29.24 |
| 2026-05-28 12:00 |
09:12:11.75 |
-30:25:14.0 |
HIP 45001 |
29.37 |
| 2026-05-29 00:00 |
09:12:12.60 |
-30:24:51.7 |
HIP 45001 |
29.52 |
| 2026-05-29 12:00 |
09:12:13.46 |
-30:24:29.5 |
HIP 45001 |
29.67 |
| 2026-05-30 00:00 |
09:12:14.35 |
-30:24:07.5 |
HIP 45001 |
29.83 |
| 2026-05-30 12:00 |
09:12:15.25 |
-30:23:45.6 |
HIP 45001 |
30.00 |
| 2026-05-31 00:00 |
09:12:16.18 |
-30:23:23.9 |
HIP 45001 |
30.18 |
| 2026-05-31 12:00 |
09:12:17.13 |
-30:23:02.3 |
HIP 45001 |
30.37 |
| 2026-06-01 00:00 |
09:12:18.09 |
-30:22:40.8 |
HIP 45001 |
30.57 |
| 2026-06-01 12:00 |
09:12:19.08 |
-30:22:19.6 |
HIP 45001 |
30.78 |
| 2026-06-02 00:00 |
09:12:20.09 |
-30:21:58.4 |
HIP 45001 |
30.99 |