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) |
| 2026-07-29 00:00 |
07:51:18.50 |
+03:46:01.8 |
HIP 38434 |
16.64 |
| 2026-07-29 12:00 |
07:51:20.78 |
+03:45:52.8 |
HIP 38434 |
16.13 |
| 2026-07-30 00:00 |
07:51:23.05 |
+03:45:43.8 |
HIP 38434 |
15.64 |
| 2026-07-30 12:00 |
07:51:25.32 |
+03:45:34.6 |
HIP 38434 |
15.15 |
| 2026-07-31 00:00 |
07:51:27.58 |
+03:45:25.4 |
HIP 38434 |
14.67 |
| 2026-07-31 12:00 |
07:51:29.84 |
+03:45:16.1 |
HIP 38434 |
14.20 |
| 2026-08-01 00:00 |
07:51:32.10 |
+03:45:06.8 |
HIP 38434 |
13.75 |
| 2026-08-01 12:00 |
07:51:34.35 |
+03:44:57.3 |
HIP 38434 |
13.30 |
| 2026-08-02 00:00 |
07:51:36.59 |
+03:44:47.8 |
HIP 38434 |
12.86 |
| 2026-08-02 12:00 |
07:51:38.83 |
+03:44:38.2 |
HIP 38434 |
12.44 |
| 2026-08-03 00:00 |
07:51:41.07 |
+03:44:28.5 |
HIP 38434 |
12.04 |
| 2026-08-03 12:00 |
07:51:43.30 |
+03:44:18.7 |
HIP 38434 |
11.65 |
| 2026-08-04 00:00 |
07:51:45.52 |
+03:44:08.8 |
HIP 38434 |
11.28 |
| 2026-08-04 12:00 |
07:51:47.74 |
+03:43:58.9 |
HIP 38434 |
10.93 |
| 2026-08-05 00:00 |
07:51:49.95 |
+03:43:48.9 |
HIP 38434 |
10.60 |
| 2026-08-05 12:00 |
07:51:52.16 |
+03:43:38.8 |
HIP 38434 |
10.30 |
| 2026-08-06 00:00 |
07:51:54.36 |
+03:43:28.6 |
HIP 38434 |
10.02 |
| 2026-08-06 12:00 |
07:51:56.56 |
+03:43:18.4 |
HIP 38434 |
9.77 |
| 2026-08-07 00:00 |
07:51:58.75 |
+03:43:08.1 |
HIP 38434 |
9.54 |
| 2026-08-07 12:00 |
07:52:00.93 |
+03:42:57.7 |
HIP 38434 |
9.35 |
| 2026-08-08 00:00 |
07:52:03.11 |
+03:42:47.2 |
HIP 38434 |
9.20 |
| 2026-08-08 12:00 |
07:52:05.28 |
+03:42:36.7 |
HIP 38434 |
9.08 |
| 2026-08-09 00:00 |
07:52:07.44 |
+03:42:26.1 |
HIP 38434 |
8.99 |
| 2026-08-09 12:00 |
07:52:09.59 |
+03:42:15.4 |
HIP 38434 |
8.95 |
| 2026-08-10 00:00 |
07:52:11.74 |
+03:42:04.7 |
HIP 38434 |
8.94 |
| 2026-08-10 12:00 |
07:52:13.88 |
+03:41:53.9 |
HIP 38434 |
8.96 |
| 2026-08-11 00:00 |
07:52:16.01 |
+03:41:43.0 |
HIP 38434 |
9.03 |
| 2026-08-11 12:00 |
07:52:18.14 |
+03:41:32.0 |
HIP 38434 |
9.13 |
| 2026-08-12 00:00 |
07:52:20.25 |
+03:41:21.0 |
HIP 38434 |
9.26 |
| 2026-08-12 12:00 |
07:52:22.36 |
+03:41:09.9 |
HIP 38434 |
9.43 |
| 2026-08-13 00:00 |
07:52:24.46 |
+03:40:58.7 |
HIP 38434 |
9.62 |
| 2026-08-13 12:00 |
07:52:26.55 |
+03:40:47.5 |
HIP 38434 |
9.85 |
| 2026-08-14 00:00 |
07:52:28.64 |
+03:40:36.2 |
HIP 38434 |
10.10 |
| 2026-08-14 12:00 |
07:52:30.71 |
+03:40:24.8 |
HIP 38434 |
10.37 |
| 2026-08-15 00:00 |
07:52:32.77 |
+03:40:13.4 |
HIP 38434 |
10.67 |
| 2026-08-15 12:00 |
07:52:34.83 |
+03:40:01.9 |
HIP 38434 |
10.99 |
| 2026-08-16 00:00 |
07:52:36.88 |
+03:39:50.4 |
HIP 38434 |
11.32 |
| 2026-08-16 12:00 |
07:52:38.91 |
+03:39:38.8 |
HIP 38434 |
11.67 |
| 2026-08-17 00:00 |
07:52:40.94 |
+03:39:27.1 |
HIP 38434 |
12.04 |
| 2026-08-17 12:00 |
07:52:42.95 |
+03:39:15.4 |
HIP 38434 |
12.41 |
| 2026-08-18 00:00 |
07:52:44.96 |
+03:39:03.6 |
HIP 38434 |
12.80 |
| 2026-08-18 12:00 |
07:52:46.96 |
+03:38:51.7 |
HIP 38434 |
13.20 |
| 2026-08-19 00:00 |
07:52:48.94 |
+03:38:39.8 |
HIP 38434 |
13.61 |