메타데이터
| 항목 |
값 |
| Designation |
C/2019 N1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-12-01T19:23:16.494720Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:16Z |
| Obs used |
1998 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-07-05T12:59:27.196800Z |
| Discovery magnitude (MPC) |
18.68 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-22.0000000 |
| e |
0.99987061 |
| q (au) |
1.704628 |
| a (au) |
13174.772352 |
| i (deg) |
82.424805 |
| Ω (om, deg) |
13.576685 |
| ω (w, deg) |
193.445419 |
| M (ma, deg) |
359.999854 |
밝기
산란 + 전체 선형
$$
M_a = (11.769 + 2.574\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.769 |
| n |
2.574 |
| gf |
1.000 |
| gb |
-0.684 |
| k |
0.800 |
| δ90 |
9.991 |
| 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 |
| 2019-06-10 |
2020-03-24 |
+2.0405 |
-1.471 |
| 2020-03-24 |
2020-11-29 |
-0.0335 |
-0.168 |
| 2020-12-03 |
2022-09-01 |
+3.3483 |
-1.177 |
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 |
01:29:45.68 |
-17:13:17.7 |
HIP 6924 |
8.00 |
| 2026-07-29 12:00 |
01:29:43.79 |
-17:14:01.8 |
HIP 6924 |
7.52 |
| 2026-07-30 00:00 |
01:29:41.85 |
-17:14:46.0 |
HIP 6924 |
7.09 |
| 2026-07-30 12:00 |
01:29:39.85 |
-17:15:30.6 |
HIP 6924 |
6.74 |
| 2026-07-31 00:00 |
01:29:37.79 |
-17:16:15.3 |
HIP 6924 |
6.49 |
| 2026-07-31 12:00 |
01:29:35.67 |
-17:17:00.3 |
HIP 6924 |
6.33 |
| 2026-08-01 00:00 |
01:29:33.49 |
-17:17:45.5 |
HIP 6924 |
6.30 |
| 2026-08-01 12:00 |
01:29:31.24 |
-17:18:30.9 |
HIP 6924 |
6.39 |
| 2026-08-02 00:00 |
01:29:28.94 |
-17:19:16.5 |
HIP 6924 |
6.60 |
| 2026-08-02 12:00 |
01:29:26.58 |
-17:20:02.3 |
HIP 6924 |
6.94 |
| 2026-08-03 00:00 |
01:29:24.16 |
-17:20:48.3 |
HIP 6924 |
7.37 |
| 2026-08-03 12:00 |
01:29:21.68 |
-17:21:34.6 |
HIP 6924 |
7.90 |
| 2026-08-04 00:00 |
01:29:19.14 |
-17:22:21.0 |
HIP 6924 |
8.51 |
| 2026-08-04 12:00 |
01:29:16.54 |
-17:23:07.6 |
HIP 6924 |
9.19 |
| 2026-08-05 00:00 |
01:29:13.88 |
-17:23:54.4 |
HIP 6924 |
9.92 |
| 2026-08-05 12:00 |
01:29:11.17 |
-17:24:41.4 |
HIP 6924 |
10.70 |
| 2026-08-06 00:00 |
01:29:08.39 |
-17:25:28.6 |
HIP 6924 |
11.52 |
| 2026-08-06 12:00 |
01:29:05.55 |
-17:26:15.9 |
HIP 6924 |
12.38 |
| 2026-08-07 00:00 |
01:29:02.65 |
-17:27:03.5 |
HIP 6924 |
13.26 |
| 2026-08-07 12:00 |
01:28:59.70 |
-17:27:51.2 |
HIP 6924 |
14.18 |
| 2026-08-08 00:00 |
01:28:56.68 |
-17:28:39.0 |
HIP 6924 |
15.12 |
| 2026-08-08 12:00 |
01:28:53.61 |
-17:29:27.0 |
HIP 6924 |
16.09 |
| 2026-08-09 00:00 |
01:28:50.48 |
-17:30:15.2 |
HIP 6924 |
17.07 |
| 2026-08-09 12:00 |
01:28:47.29 |
-17:31:03.5 |
HIP 6924 |
18.08 |
| 2026-08-10 00:00 |
01:28:44.04 |
-17:31:52.0 |
HIP 6849 |
18.57 |
| 2026-08-10 12:00 |
01:28:40.73 |
-17:32:40.6 |
HIP 6849 |
18.91 |
| 2026-08-11 00:00 |
01:28:37.36 |
-17:33:29.3 |
HIP 6847 |
19.32 |
| 2026-08-11 12:00 |
01:28:33.94 |
-17:34:18.1 |
HIP 6847 |
19.77 |
| 2026-08-12 00:00 |
01:28:30.46 |
-17:35:07.1 |
HIP 6847 |
20.27 |
| 2026-08-12 12:00 |
01:28:26.92 |
-17:35:56.2 |
HIP 6847 |
20.83 |
| 2026-08-13 00:00 |
01:28:23.32 |
-17:36:45.4 |
HIP 6909 |
21.11 |
| 2026-08-13 12:00 |
01:28:19.67 |
-17:37:34.8 |
HIP 6909 |
20.71 |
| 2026-08-14 00:00 |
01:28:15.95 |
-17:38:24.2 |
HIP 6909 |
20.39 |
| 2026-08-14 12:00 |
01:28:12.18 |
-17:39:13.7 |
HIP 6909 |
20.14 |
| 2026-08-15 00:00 |
01:28:08.36 |
-17:40:03.3 |
HIP 6909 |
19.96 |
| 2026-08-15 12:00 |
01:28:04.48 |
-17:40:53.0 |
HIP 6909 |
19.87 |
| 2026-08-16 00:00 |
01:28:00.54 |
-17:41:42.8 |
HIP 6909 |
19.86 |
| 2026-08-16 12:00 |
01:27:56.54 |
-17:42:32.7 |
HIP 6909 |
19.94 |
| 2026-08-17 00:00 |
01:27:52.49 |
-17:43:22.6 |
HIP 6909 |
20.11 |
| 2026-08-17 12:00 |
01:27:48.39 |
-17:44:12.6 |
HIP 6857 |
20.29 |
| 2026-08-18 00:00 |
01:27:44.23 |
-17:45:02.7 |
HIP 6857 |
19.80 |
| 2026-08-18 12:00 |
01:27:40.01 |
-17:45:52.8 |
HIP 6857 |
19.38 |
| 2026-08-19 00:00 |
01:27:35.75 |
-17:46:42.9 |
HIP 6857 |
19.04 |