C/1999 N4 (LINEAR)
메타데이터
| 항목 |
값 |
| Designation |
C/1999 N4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-05-23T17:39:49.492800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:01Z |
| Obs used |
325 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
8.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-05-14.0000000 |
| e |
1.00420028 |
| q (au) |
5.504749 |
| a (au) |
-1310.567768 |
| i (deg) |
156.922895 |
| Ω (om, deg) |
345.901167 |
| ω (w, deg) |
90.429036 |
| M (ma, deg) |
-0.000202 |
밝기
산란 + 전체 선형
$$
M_a = (1.577 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
1.577 |
| 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 |
| 1998-08-27 |
2000-05-22 |
-0.2602 |
+0.449 |
| 2000-05-29 |
2002-05-06 |
+11.7020 |
-9.733 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
07:50:01.55 |
+03:08:46.1 |
HIP 38193 |
9.05 |
| 2026-02-03 12:00 |
07:49:58.75 |
+03:08:56.7 |
HIP 38193 |
8.36 |
| 2026-02-04 00:00 |
07:49:55.96 |
+03:09:07.5 |
HIP 38193 |
7.69 |
| 2026-02-04 12:00 |
07:49:53.18 |
+03:09:18.3 |
HIP 38193 |
7.02 |
| 2026-02-05 00:00 |
07:49:50.40 |
+03:09:29.3 |
HIP 38193 |
6.36 |
| 2026-02-05 12:00 |
07:49:47.64 |
+03:09:40.3 |
HIP 38193 |
5.72 |
| 2026-02-06 00:00 |
07:49:44.88 |
+03:09:51.3 |
HIP 38189 |
5.08 |
| 2026-02-06 12:00 |
07:49:42.14 |
+03:10:02.5 |
HIP 38189 |
4.46 |
| 2026-02-07 00:00 |
07:49:39.40 |
+03:10:13.7 |
HIP 38189 |
3.87 |
| 2026-02-07 12:00 |
07:49:36.67 |
+03:10:25.1 |
HIP 38189 |
3.32 |
| 2026-02-08 00:00 |
07:49:33.95 |
+03:10:36.4 |
HIP 38189 |
2.85 |
| 2026-02-08 12:00 |
07:49:31.24 |
+03:10:47.9 |
HIP 38189 |
2.49 |
| 2026-02-09 00:00 |
07:49:28.54 |
+03:10:59.4 |
HIP 38189 |
2.29 |
| 2026-02-09 12:00 |
07:49:25.86 |
+03:11:11.1 |
HIP 38189 |
2.30 |
| 2026-02-10 00:00 |
07:49:23.18 |
+03:11:22.7 |
HIP 38189 |
2.50 |
| 2026-02-10 12:00 |
07:49:20.51 |
+03:11:34.5 |
HIP 38189 |
2.86 |
| 2026-02-11 00:00 |
07:49:17.85 |
+03:11:46.3 |
HIP 38189 |
3.33 |
| 2026-02-11 12:00 |
07:49:15.21 |
+03:11:58.2 |
HIP 38189 |
3.86 |
| 2026-02-12 00:00 |
07:49:12.58 |
+03:12:10.2 |
HIP 38189 |
4.43 |
| 2026-02-12 12:00 |
07:49:09.95 |
+03:12:22.2 |
HIP 38189 |
5.03 |
| 2026-02-13 00:00 |
07:49:07.34 |
+03:12:34.3 |
HIP 38189 |
5.64 |
| 2026-02-13 12:00 |
07:49:04.74 |
+03:12:46.4 |
HIP 38189 |
6.27 |
| 2026-02-14 00:00 |
07:49:02.16 |
+03:12:58.7 |
HIP 38189 |
6.90 |
| 2026-02-14 12:00 |
07:48:59.58 |
+03:13:11.0 |
HIP 38189 |
7.54 |
| 2026-02-15 00:00 |
07:48:57.02 |
+03:13:23.3 |
HIP 38189 |
8.18 |
| 2026-02-15 12:00 |
07:48:54.47 |
+03:13:35.7 |
HIP 38189 |
8.82 |
| 2026-02-16 00:00 |
07:48:51.94 |
+03:13:48.2 |
HIP 38189 |
9.46 |
| 2026-02-16 12:00 |
07:48:49.41 |
+03:14:00.7 |
HIP 38189 |
10.10 |
| 2026-02-17 00:00 |
07:48:46.91 |
+03:14:13.3 |
HIP 38189 |
10.75 |
| 2026-02-17 12:00 |
07:48:44.41 |
+03:14:25.9 |
HIP 38189 |
11.39 |
| 2026-02-18 00:00 |
07:48:41.93 |
+03:14:38.6 |
HIP 38189 |
12.03 |
| 2026-02-18 12:00 |
07:48:39.46 |
+03:14:51.3 |
HIP 38189 |
12.66 |
| 2026-02-19 00:00 |
07:48:37.00 |
+03:15:04.1 |
HIP 38189 |
13.30 |
| 2026-02-19 12:00 |
07:48:34.56 |
+03:15:17.0 |
HIP 38189 |
13.93 |
| 2026-02-20 00:00 |
07:48:32.14 |
+03:15:29.9 |
HIP 38189 |
14.56 |
| 2026-02-20 12:00 |
07:48:29.73 |
+03:15:42.8 |
HIP 38189 |
15.19 |
| 2026-02-21 00:00 |
07:48:27.33 |
+03:15:55.8 |
HIP 38189 |
15.82 |
| 2026-02-21 12:00 |
07:48:24.95 |
+03:16:08.9 |
HIP 38189 |
16.44 |
| 2026-02-22 00:00 |
07:48:22.58 |
+03:16:22.0 |
HIP 38189 |
17.06 |
| 2026-02-22 12:00 |
07:48:20.23 |
+03:16:35.1 |
HIP 38189 |
17.68 |
| 2026-02-23 00:00 |
07:48:17.90 |
+03:16:48.3 |
HIP 38189 |
18.29 |
| 2026-02-23 12:00 |
07:48:15.58 |
+03:17:01.5 |
HIP 38189 |
18.90 |
| 2026-02-24 00:00 |
07:48:13.27 |
+03:17:14.7 |
HIP 38189 |
19.51 |